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The angle of elevation of a jet plane from a point A on the ground is 600.After a flight of 15 sec,the angle of elevation changes to 300.If the jet plane is flying at a height of 1500 root 3 m,find the speed of the jet plane.
From the top of the building 60m high the angle of depression of the top and bottom of a vertical lamp post are observed to be 30 degree and 60 degree respectively find
a)the distance between the building and the lamp post
b)the height of the lamp post
The angle of elevation of a jet fighter from point A on the ground is 60°.After a flight of 15 seconds, the angle of elevation changes to 30°.If the jet is flying at a speed of 720 km/h, find the constant height at which jet is flying.
1. an aeroplane flying horizontally at a height of 1.4km above the ground is observed at an elevation od 60degree. after 15 s , its elevation at the same point is obsreved to be 30degree. calculate the speed of the aeroplane in km/h.
2. the angle of elevation of a jet fighter from point A on the ground is 60degree. after a flight of 15 sec, the angle of elevation changes to 30degree. if the jet is flying at a speed of 720km/h, find the constant height at which the jet is flying. (root3=1.732)
3. at a point on the ground level, the angle of elevation of the vertical tower is found to be such that its tangent is 5/12. on walking 240m towards the tower, the tangent of the angle of elevation becomes 3/4. find the height of the tower.
3.the angles od depressio of the top an dbottom of 8m tall building from the top of a multistorey building are 30 and 45 degrees respectyively. find the height of the multi-storey bldg and the distance b/w the 2 bldgs.
4. from the top of a hill. the angles of depression of 2 consecutive km stones due east are found to be 30 and 45 respectively . find the height of the hill.
5. a bird sitting on the top of a tree, which is 80m high.the angle of elevation of the bird from a point on the ground is 45. the bird flies away from the point of observation horizontally and remains at a constant height. after 2 sec, the angle of elevation of the bird from the point of observation becomes30. find the speed of the bird.
6. the angles of elevation of the top of a tower as seen from 2 points A and B situated in the same line and at distances p and q respectively from the foot of the tower are complementary. prove that the height of the tower is rootpq.
7.from a window(60m above the ground) of a house in the stret, the angle of elevation and depression of the foot of the house on the opposite side of the street rae 60 and 45 respectively, show that the height of the opposite house is 60(i = root3).
If the angle of elevation of a cloud from a point h metres above a lake is alpha and the angle of depression of its reflection is beta. Prove that the height of cloud is h(tan beta + tan alpha)/ tan beta - tan alpha
The angle of elevation of a cloud from a point 60m above the lake is 30 and the angle of depression of its reflection in the lake is 60.find the height of the cloud above the lake?
In a flight of 600 km , an aircraft was slowed down due to bad weather. The average speed for the trip was decreased by 200 km/h & the time of flight increased by 30 minutes. Find the duration of flight.
A man standing on the deck of a ship, which is 10m above the water level, observes the angle of elevation of the top of a hill as 60 degree and the angle of depression of the base of the hill as 30 degree. Find the distance of the hill fom the ship and the height of the hill.
A tree 12m high, is broken by the wind in such a way that its top touches the ground and makes an angle of 60degree with the ground .. At what height from the bottom, the is broken by the wind???
The Angle of elevation of th top of a vertical tower from a point on the ground is 60o.From another point 10m vertically above the first, its angle of elevation is 30o.Find the height of tower? ...................Please provide me answer as soon as possible....
The angle of elevation of the top Q of a vertical tower PQ from point X on the ground is 60 degree.At a point Y 40m vertically above X the angle of elevation is 45 degree .Find the height Of the tower PQ and distance XQ.
the angles of depression of the top and bottom of an 8m tall building from the top and bottom of a multistoreyed buildin are 30 and 45 degrees respectively. find the height of the multistoreyed building and the distance between the twoo buildings. please anser me fast today is my test.
the angles of elevation of the top of a tower from two points at a distance of 4m and 9m from the base of the tower and in the same straight line with it are complementary. prove that the height of the tower is 6 m
a man standing on deck of ship which is 10m above the sea level, observes the angle of elevation of the top of a cloud as 30 degree and angle of depression of its reflection in the sea was found to be 60 degree. find the height of the cloud and also the distance of cloud from the ship
A boy standing on a horizontal plane finds a bird flying at a distance of 100m fromhim at an elevation of 30
A boy standing on a horizontal plane finds a bird flying at a distance of 100m from
him at an elevation of 30
0. A girl standing on the roof of 20 meter high building finds the angle of elevation of the same bird to be 450. Both the boy and the girl are on opposite sides of the bird. Find the distance of the bird from the girl.
From the top of a hill the angle of depression of the two consecutive kilometre stones due to east are found to be 30o and 45o.Find the height of a hill.
Two boats approach a light house in mid-sea from opposite directions.The Angles of elevation of the top of the light house from two boats are 60 and 45 respectively.If the distance between the two boats is 100m,find the height of hte light house.
FROM THE TOP OF A TOWER 50M HIGH THE ANGLES OF DEPRESSION OF THE TOP AND THE BOTTOM OF A POLE ARE OBSERVED TO BE 45DEGREE AND 60DEGREE RESPECTIVELY. FIND THE HEIGHT OF THE TOWER
An aero plane, when 3000m high, passes vertically above another plane at an instant when the angles of elevation of the two aero planes from the same point on the ground are 600 and 450 respectively. Find the vertical distance between the two aero planes.
Find the cosine of the angle swept by the minute hand of a clock in 20 minutes.
a ladder rests against a vertical wall at an inclination of alpha to the horizontal.its foot is pulled away from the wall through a distance p so that its upper end slides a distance q down the wall and then the ladder makes an angle of beta to the horizontal show that
p/q= cos beta - cos alpha/ sin alpha -sin beta
a bird sitting on the top of a tree, which is 80m high. the angle of elevation of the bird, from the point on the ground is 450. the bird flies away from the point of observation horizantally and remains at a constant height. after 2 seconds, the angle of elevation of the bird from the point of observation becomes 300. find the sped of the flying bird
From a top of a 7m high building, the angle of elevation of the top of a cable tower is 60 degree & the angle of depression of its foot is 45 degree. Determine the height of the tower.
PLZ ANSWER IN UNDERROOTS & WITH THE FIGURE.
WITHOUT USING TRIGONOMETRIC TABLE,PROVE-
sin 5 tan 22 sec 60 tan 68 sec 85 = 2
as observed from the top of a lighthouse 100m above sea level the angle of depression of a ship sailing directly towards it changes from 30 degree to 60 degree. determine the distance travelled by the ship during the period of observation
1. a vertical post stands on a horizontal plane. the angle of elevation of the top is 60 ° and that of a point xm be the height of the post, then prove that x=2h/3.
2. a fire in a building B is reported on telephone to 2 fire stations P nd Q, 10 km apart from each other on a straight road.P observes that the fire is at an angle of 60 ° to the road and Q observes that it is angle of 45 ° to the road. which station shold send its team and how much will the team have to travel?
3.a man on a top of tower observes a truck at angle of depressionα where tan α= 1/√5 and sees that it is moving towards the base of the tower. ten minutes later, the angle of depression of the truck is found to be β where tan β= √5, if the truck is moving at a uniform speed, determine how much more time it will take to reach the base of the tower.
a pole 6 m high casts a shadow 2 root 3 m on the ground then the sun's elevation is :
a-60 degrees
b-45 degrees
c - 30 degrees
d-90 degrees
Point A is hm above the ground level BC. DC represents the tower. The angle of elevation of the top of the tower from point A is α and the and the angle of depression of the base of the tower from point A is β. Prove that the height of the tower is h(tan α + tan β) / tan β
An aeroplane flying horizontally 1 km above the ground is observed at an elevation of 60V. After a flight of 10 seconds, its angle of elevation is observed to be 30V from the same point on the ground. Find the speed of the aeroplane in km/hour.
At the foot of a mountain the elevation of its summit is 45° . After ascending 1000m
on the top of a tower 100 m high a man observes two cars on the opposite sides of the tower with angles of depression 600 and 450 respectively find the distance between the cars
16)the angle of elevation of the top of a tower from a point A on the ground is 30 degree.on moving a distance of 20metres towards the foot of the tower to a point B the angle of elevation increases to 60 degree.find the height o the tower and the distance of the tower from the point A.
A boy standing on a horizontal plane find a bird flying at a distance of 100m from him at an elevation of 30◦.A girl standing on the roof of 20m high building,find the angle of elevation of same bird to be 45◦.Both the boy and the girl are on on opposite sides of the bird .find the distance of bird from the girl.
A straight highway leads to the foot of a tower. A man standing at the top of the tower observes a car as an angle of depression of 30°, which is approaching the foot of the tower with a uniform speed. Six seconds later, the angle of depression of the car is found to be 60°. Find the time taken by the car to reach the foot of the tower from this point.
The length of the shadow of a tower standing on level ground is found to be 2x metres longer when the sun’s altitude is 30° than when it was 45°. Prove that the height of tower is (√3+1)xmetres.
A fire in building B is reported on telephone to two fire stations P and Q, 20 km apart from each other on a straight road. P observes that the fire is at an angle of 60 degree to the road and Q observes it an angle of 45 degrees to the road.Which station should send its team and how much will the team have to travel ?
an aeroplane at an altitude of 200m the angle of depression of two opposite pointso two banks of a river to be 45 and 60 degrees. find the width of the river in meters
SinQ/(SecQ+tanQ-1) + CosQ/(CosecQ+CotQ-1)=1
From a point on the ground, the angles of elevation of the bottom and the top of a transmission tower fixed at the top of a 20 m high building are 45° and 60° respectively. Find the height of the tower
A fire in the building B is reported on telephone to two fire stations P and Q, 20km apart from each other on a straight road. P observes that the fire is at the angle of 60° to the road and Q observes that it is at an angle of 45° to the road. Which station should send its team and how much will this team have to travel?
Two poles of equal heights are standing opposite each other on either side of the road, which is 80 m wide. From a point between them on the road, the angles of elevation of the top of the poles are 60 digree and 30 digree, respectively. Find the height of the poles and the distance of the point from the poles.
9) a vertical tower stands on a horizontal plane and is surmounted by a vertical flag-staff of height 5 metres.at a point on the plane,the angles of elevation of the bottom and the top of the flag-staff are respectively 30 degree and 60 degree.find the height of the tower.
the tops of two poles of height 16m and 10m are connected by a wire . If the wire makes an angle of 30 with the horizontal , then the length of the wire ... ??
From a point 100m above a lake the angle of elevation of a 30 degree and angle of depression of its reflecting in the lake is 60 degree. find the height of helicopter.
A man on a deck of a ship 12m above water level observes the angle of elevation of the top pf a cliff is 60degree and the angle of depression of the base of the cliff is 30degree. Find the distance of the cliff from the ship and the height if the cliff .
from a window 60m high above the ground of a house in a street the angles of elevation and depression of the top and foot of another house on the opposite side of the streer are 60degree and 45degree respectively. show that the height of th opposite house is 60(1+ root3)
a tree 15 m tall casts a shadow of 20 m long .at the same time a flag pole casts a shadow 100 m long .then the length of the flag pole is
angle of elevation of the top of the hill at the foot of tower is 60 degrees and the angle of elevation of tower from the foot of the hill is 30 degrees. if tower is 50m high find the height of hill
A man on cliff observes a boat at an angle of depression of 30 degree which is approaching the shore to the point immediately beneath the observer with a uniform speed. Six minutes later , the angle of depression of the boat is found to be 60 degree . Find the total time taken by the boat to reach the shore .
A 1.6m tall, girl stands ata distance of 3.2m from a lamp-post and cats a shadow of 4.8m on the grond. Find the height of the lamp-post by using (i)trignometric ratios (ii)property of similiar triangles.
From a terrace of a house 8m high, the angle of elevation of the top of the tower is 45degree and the angle of depression of its reflection in a lake is found to be 60 degree. determine the height of the tower from the ground.
PLZZZ ITS URGET 2MORROW MATHS EXAM
A round balloon of radius r subtends an angle α at the eye of the
from a point 100m above a lake, the angle of elevation of a stationary helicopter is 30 deg. and the angle of depression of reflection of the helicopter in the lake is 60 deg. find the height of the helicopter.
the angles of depression of two ships from the top of a light house are 45 and 30 towards east.if the ship some 100 m apart find the height of light house?
At a point on level ground, the angle of elevation of a vertical tower is found such that it's tangent is 5/12 . On walking 19.2 mtrs towards the tower , the tangent of the angle of elevation is 3/4 . Find height of the tower?????
A bridge, in the shape of straight path, across a river, makes an angle of 60 with the width ofthe river. If the length of the bridge is 100 metres, then the width of the river is(A) 50 m (B) 173.2 m (C) 43.3 m (D) 100 m
As observed from the top of a 75 m high lighthouse from the sea-level, the angles of depression of two ships are 30° and 45°. If one ship is exactly behind the other on the same side of the lighthouse, find the distance between the two ships.
The angle of elevation of a cliff from a fixed point is θ. After going up a distance of 'k' meters towards the top of the cliff at an angle of φ, its found that the angle of elevation is α. Show that the height of the cliff is k(cosφ - sinφ cotα)/cotθ - cotα
An aeroplane flying horizontally at a height of 2500m above the ground is observed at a certain point on earth to subtend and angle of 600. After 15 seconds, its angle of elevation at the same point is observed to be 300. Calculate the speed of the aeroplane.
the ang le of depression of two ships from the top of a light house are 45 & 30 towards east if the ships are 200m apart find the height of the light house
The shadow of a tower standing on the level ground is found to be 40 m
longer when the sun’s altitude is 30 than when it is 60Find the height
of the tower.
Sin4 + Cos4 = 1 - 2Sin2Cos2
Q.There are two temples, one on each bank of a river, just opposite to each other. One temple is 50m high. From the top of this temple, the angles of depression of the top &the foot of the other temple are 300 & 600 respectively. Find the width of the river and the hight of the other temple.
At a distance 'a' from the foot of a tower of height 'b' ,the tower and the flagstaff at the top of the tower make equal angles. Show that the height of the flagstaff is b[ a2+ b2] / a2 - b2 .
the angle of elevation of an aeroplane from a point on the ground is 45 degree. After 15 seconds of flight the angle changes to 30 degree.f the plane is flying at a constant height of 2500m,find the speed of the plane.
FAAST GUYZ!! MA ASSIGNMENT
IF A PERSON ONWALKING 20 M TOWARDS CHIMNEY IN A HORIZONTAL LINE THROUGH ITS BASE OBSERVES THAT ITS ANGLE OF ELEVATION CHANGES FRO 30 TO 456 THEN THE HEIGHT OF CHIMNEY???
A tree breaks due to storm and the broken part bends, so that the top of the tree touches the ground making an angle of 30 degree with the ground. The distance between the foot of the tree to the point where the top touches the ground is 8m find he height of the tree.
hi.....i need some help,,,, if any1 izz gd in trignometry,,,,,,,den pls..........................
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Syllabus
The angle of elevation of a jet plane from a point A on the ground is 600.After a flight of 15 sec,the angle of elevation changes to 300.If the jet plane is flying at a height of 1500 root 3 m,find the speed of the jet plane.
From the top of the building 60m high the angle of depression of the top and bottom of a vertical lamp post are observed to be 30 degree and 60 degree respectively find
a)the distance between the building and the lamp post
b)the height of the lamp post
The angle of elevation of a jet fighter from point A on the ground is 60°.After a flight of 15 seconds, the angle of elevation changes to 30°.If the jet is flying at a speed of 720 km/h, find the constant height at which jet is flying.
1. an aeroplane flying horizontally at a height of 1.4km above the ground is observed at an elevation od 60degree. after 15 s , its elevation at the same point is obsreved to be 30degree. calculate the speed of the aeroplane in km/h.
2. the angle of elevation of a jet fighter from point A on the ground is 60degree. after a flight of 15 sec, the angle of elevation changes to 30degree. if the jet is flying at a speed of 720km/h, find the constant height at which the jet is flying. (root3=1.732)
3. at a point on the ground level, the angle of elevation of the vertical tower is found to be such that its tangent is 5/12. on walking 240m towards the tower, the tangent of the angle of elevation becomes 3/4. find the height of the tower.
3.the angles od depressio of the top an dbottom of 8m tall building from the top of a multistorey building are 30 and 45 degrees respectyively. find the height of the multi-storey bldg and the distance b/w the 2 bldgs.
4. from the top of a hill. the angles of depression of 2 consecutive km stones due east are found to be 30 and 45 respectively . find the height of the hill.
5. a bird sitting on the top of a tree, which is 80m high.the angle of elevation of the bird from a point on the ground is 45. the bird flies away from the point of observation horizontally and remains at a constant height. after 2 sec, the angle of elevation of the bird from the point of observation becomes30. find the speed of the bird.
6. the angles of elevation of the top of a tower as seen from 2 points A and B situated in the same line and at distances p and q respectively from the foot of the tower are complementary. prove that the height of the tower is rootpq.
7.from a window(60m above the ground) of a house in the stret, the angle of elevation and depression of the foot of the house on the opposite side of the street rae 60 and 45 respectively, show that the height of the opposite house is 60(i = root3).
If the angle of elevation of a cloud from a point h metres above a lake is alpha and the angle of depression of its reflection is beta. Prove that the height of cloud is h(tan beta + tan alpha)/ tan beta - tan alpha
The angle of elevation of a cloud from a point 60m above the lake is 30 and the angle of depression of its reflection in the lake is 60.find the height of the cloud above the lake?
In a flight of 600 km , an aircraft was slowed down due to bad weather. The average speed for the trip was decreased by 200 km/h & the time of flight increased by 30 minutes. Find the duration of flight.
A man standing on the deck of a ship, which is 10m above the water level, observes the angle of elevation of the top of a hill as 60 degree and the angle of depression of the base of the hill as 30 degree. Find the distance of the hill fom the ship and the height of the hill.
A tree 12m high, is broken by the wind in such a way that its top touches the ground and makes an angle of 60degree with the ground .. At what height from the bottom, the is broken by the wind???
The Angle of elevation of th top of a vertical tower from a point on the ground is 60o.From another point 10m vertically above the first, its angle of elevation is 30o.Find the height of tower? ...................Please provide me answer as soon as possible....
The angle of elevation of the top Q of a vertical tower PQ from point X on the ground is 60 degree.At a point Y 40m vertically above X the angle of elevation is 45 degree .Find the height Of the tower PQ and distance XQ.
the angles of depression of the top and bottom of an 8m tall building from the top and bottom of a multistoreyed buildin are 30 and 45 degrees respectively. find the height of the multistoreyed building and the distance between the twoo buildings. please anser me fast today is my test.
the angles of elevation of the top of a tower from two points at a distance of 4m and 9m from the base of the tower and in the same straight line with it are complementary. prove that the height of the tower is 6 m
a man standing on deck of ship which is 10m above the sea level, observes the angle of elevation of the top of a cloud as 30 degree and angle of depression of its reflection in the sea was found to be 60 degree. find the height of the cloud and also the distance of cloud from the ship
A boy standing on a horizontal plane finds a bird flying at a distance of 100m from
him at an elevation of 30
0. A girl standing on the roof of 20 meter high building finds the angle of elevation of the same bird to be 450. Both the boy and the girl are on opposite sides of the bird. Find the distance of the bird from the girl.
From the top of a hill the angle of depression of the two consecutive kilometre stones due to east are found to be 30o and 45o.Find the height of a hill.
Two boats approach a light house in mid-sea from opposite directions.The Angles of elevation of the top of the light house from two boats are 60 and 45 respectively.If the distance between the two boats is 100m,find the height of hte light house.
FROM THE TOP OF A TOWER 50M HIGH THE ANGLES OF DEPRESSION OF THE TOP AND THE BOTTOM OF A POLE ARE OBSERVED TO BE 45DEGREE AND 60DEGREE RESPECTIVELY. FIND THE HEIGHT OF THE TOWER
An aero plane, when 3000m high, passes vertically above another plane at an instant when the angles of elevation of the two aero planes from the same point on the ground are 600 and 450 respectively. Find the vertical distance between the two aero planes.
Find the cosine of the angle swept by the minute hand of a clock in 20 minutes.
a ladder rests against a vertical wall at an inclination of alpha to the horizontal.its foot is pulled away from the wall through a distance p so that its upper end slides a distance q down the wall and then the ladder makes an angle of beta to the horizontal show that
p/q= cos beta - cos alpha/ sin alpha -sin beta
a bird sitting on the top of a tree, which is 80m high. the angle of elevation of the bird, from the point on the ground is 450. the bird flies away from the point of observation horizantally and remains at a constant height. after 2 seconds, the angle of elevation of the bird from the point of observation becomes 300. find the sped of the flying bird
From a top of a 7m high building, the angle of elevation of the top of a cable tower is 60 degree & the angle of depression of its foot is 45 degree. Determine the height of the tower.
PLZ ANSWER IN UNDERROOTS & WITH THE FIGURE.
WITHOUT USING TRIGONOMETRIC TABLE,PROVE-
sin 5 tan 22 sec 60 tan 68 sec 85 = 2
as observed from the top of a lighthouse 100m above sea level the angle of depression of a ship sailing directly towards it changes from 30 degree to 60 degree. determine the distance travelled by the ship during the period of observation
1. a vertical post stands on a horizontal plane. the angle of elevation of the top is 60 ° and that of a point xm be the height of the post, then prove that x=2h/3.
2. a fire in a building B is reported on telephone to 2 fire stations P nd Q, 10 km apart from each other on a straight road.P observes that the fire is at an angle of 60 ° to the road and Q observes that it is angle of 45 ° to the road. which station shold send its team and how much will the team have to travel?
3.a man on a top of tower observes a truck at angle of depressionα where tan α= 1/√5 and sees that it is moving towards the base of the tower. ten minutes later, the angle of depression of the truck is found to be β where tan β= √5, if the truck is moving at a uniform speed, determine how much more time it will take to reach the base of the tower.
a pole 6 m high casts a shadow 2 root 3 m on the ground then the sun's elevation is :
a-60 degrees
b-45 degrees
c - 30 degrees
d-90 degrees
Point A is hm above the ground level BC. DC represents the tower. The angle of elevation of the top of the tower from point A is α and the and the angle of depression of the base of the tower from point A is β. Prove that the height of the tower is h(tan α + tan β) / tan β
An aeroplane flying horizontally 1 km above the ground is observed at an elevation of 60V. After a flight of 10 seconds, its angle of elevation is observed to be 30V from the same point on the ground. Find the speed of the aeroplane in km/hour.
Experts please answer fast
At the foot of a mountain the elevation of its summit is 45° . After ascending 1000m
on the top of a tower 100 m high a man observes two cars on the opposite sides of the tower with angles of depression 600 and 450 respectively find the distance between the cars
16)the angle of elevation of the top of a tower from a point A on the ground is 30 degree.on moving a distance of 20metres towards the foot of the tower to a point B the angle of elevation increases to 60 degree.find the height o the tower and the distance of the tower from the point A.
A boy standing on a horizontal plane find a bird flying at a distance of 100m from him at an elevation of 30◦.A girl standing on the roof of 20m high building,find the angle of elevation of same bird to be 45◦.Both the boy and the girl are on on opposite sides of the bird .find the distance of bird from the girl.
A straight highway leads to the foot of a tower. A man standing at the top of the tower observes a car as an angle of depression of 30°, which is approaching the foot of the tower with a uniform speed. Six seconds later, the angle of depression of the car is found to be 60°. Find the time taken by the car to reach the foot of the tower from this point.
The length of the shadow of a tower standing on level ground is found to be 2x metres longer
when the sun’s altitude is 30° than when it was 45°. Prove that the height of tower is (√3+1)x
metres.
A fire in building B is reported on telephone to two fire stations P and Q, 20 km apart from each other on a straight road. P observes that the fire is at an angle of 60 degree to the road and Q observes it an angle of 45 degrees to the road.Which station should send its team and how much will the team have to travel ?
I asked this question but replay mail image is not come in the answer coulmn
an aeroplane at an altitude of 200m the angle of depression of two opposite pointso two banks of a river to be 45 and 60 degrees. find the width of the river in meters
SinQ/(SecQ+tanQ-1) + CosQ/(CosecQ+CotQ-1)=1
From a point on the ground, the angles of elevation of the bottom and the top of a transmission tower fixed at the top of a 20 m high building are 45° and 60° respectively. Find the height of the tower
A fire in the building B is reported on telephone to two fire stations P and Q, 20km apart from each other on a straight road. P observes that the fire is at the angle of 60° to the road and Q observes that it is at an angle of 45° to the road. Which station should send its team and how much will this team have to travel?
Two poles of equal heights are standing opposite each other on either side of the road, which is 80 m wide. From a point between them on the road, the angles of elevation of the top of the poles are 60 digree and 30 digree, respectively. Find the height of the poles and the distance of the point from the poles.
9) a vertical tower stands on a horizontal plane and is surmounted by a vertical flag-staff of height 5 metres.at a point on the plane,the angles of elevation of the bottom and the top of the flag-staff are respectively 30 degree and 60 degree.find the height of the tower.
Q. Evaluate : , when A = 10.
the tops of two poles of height 16m and 10m are connected by a wire . If the wire makes an angle of 30 with the horizontal , then the length of the wire ... ??
From a point 100m above a lake the angle of elevation of a 30 degree and angle of depression of its reflecting in the lake is 60 degree. find the height of helicopter.
A man on a deck of a ship 12m above water level observes the angle of elevation of the top pf a cliff is 60degree and the angle of depression of the base of the cliff is 30degree. Find the distance of the cliff from the ship and the height if the cliff .
from a window 60m high above the ground of a house in a street the angles of elevation and depression of the top and foot of another house on the opposite side of the streer are 60degree and 45degree respectively. show that the height of th opposite house is 60(1+ root3)
a tree 15 m tall casts a shadow of 20 m long .at the same time a flag pole casts a shadow 100 m long .then the length of the flag pole is
angle of elevation of the top of the hill at the foot of tower is 60 degrees and the angle of elevation of tower from the foot of the hill is 30 degrees. if tower is 50m high find the height of hill
A man on cliff observes a boat at an angle of depression of 30 degree which is approaching the shore to the point immediately beneath the observer with a uniform speed. Six minutes later , the angle of depression of the boat is found to be 60 degree . Find the total time taken by the boat to reach the shore .
A 1.6m tall, girl stands ata distance of 3.2m from a lamp-post and cats a shadow of 4.8m on the grond. Find the height of the lamp-post by using (i)trignometric ratios (ii)property of similiar triangles.
From a terrace of a house 8m high, the angle of elevation of the top of the tower is 45degree and the angle of depression of its reflection in a lake is found to be 60 degree. determine the height of the tower from the ground.
PLZZZ ITS URGET 2MORROW MATHS EXAM
A round balloon of radius r subtends an angle α at the eye of the
from a point 100m above a lake, the angle of elevation of a stationary helicopter is 30 deg. and the angle of depression of reflection of the helicopter in the lake is 60 deg. find the height of the helicopter.
the angles of depression of two ships from the top of a light house are 45 and 30 towards east.if the ship some 100 m apart find the height of light house?
At a point on level ground, the angle of elevation of a vertical tower is found such that it's tangent is 5/12 . On walking 19.2 mtrs towards the tower , the tangent of the angle of elevation is 3/4 . Find height of the tower?????
A bridge, in the shape of straight path, across a river, makes an angle of 60 with the width of
the river. If the length of the bridge is 100 metres, then the width of the river is
(A) 50 m (B) 173.2 m (C) 43.3 m (D) 100 m
As observed from the top of a 75 m high lighthouse from the sea-level, the angles of depression of two ships are 30° and 45°. If one ship is exactly behind the other on the same side of the lighthouse, find the distance between the two ships.
The angle of elevation of a cliff from a fixed point is θ. After going up a distance of 'k' meters towards the top of the cliff at an angle of φ, its found that the angle of elevation is α. Show that the height of the cliff is k(cosφ - sinφ cotα)/cotθ - cotα
An aeroplane flying horizontally at a height of 2500m above the ground is observed at a certain point on earth to subtend and angle of 600. After 15 seconds, its angle of elevation at the same point is observed to be 300. Calculate the speed of the aeroplane.
the ang le of depression of two ships from the top of a light house are 45 & 30 towards east if the ships are 200m apart find the height of the light house
The shadow of a tower standing on the level ground is found to be 40 m
longer when the sun’s altitude is 30
than when it is 60
Find the height
of the tower.
Sin4 + Cos4 = 1 - 2Sin2Cos2
Q.There are two temples, one on each bank of a river, just opposite to each other. One temple is 50m high. From the top of this temple, the angles of depression of the top &the foot of the other temple are 300 & 600 respectively. Find the width of the river and the hight of the other temple.
At a distance 'a' from the foot of a tower of height 'b' ,the tower and the flagstaff at the top of the tower make equal angles. Show that the height of the flagstaff is b[ a2+ b2] / a2 - b2 .
the angle of elevation of an aeroplane from a point on the ground is 45 degree. After 15 seconds of flight the angle changes to 30 degree.f the plane is flying at a constant height of 2500m,find the speed of the plane.
FAAST GUYZ!! MA ASSIGNMENT
IF A PERSON ONWALKING 20 M TOWARDS CHIMNEY IN A HORIZONTAL LINE THROUGH ITS BASE OBSERVES THAT ITS ANGLE OF ELEVATION CHANGES FRO 30 TO 456 THEN THE HEIGHT OF CHIMNEY???
A tree breaks due to storm and the broken part bends, so that the top of the tree touches the ground making an angle of 30 degree with the ground. The distance between the foot of the tree to the point where the top touches the ground is 8m find he height of the tree.
observed that the angle of elevation of the top of the
tower changed to 600 from 450. How much more than
will he take to reach of the tower?
(a) 5 min
(c) min
(b) 5 min
(d) None of these
hi.....i need some help,,,, if any1 izz gd in trignometry,,,,,,,den pls..........................