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Payal Arora
Subject: Maths
, asked on 9/1/18
Chapter: heights and distance
Q.26. Anjali in an electrician and she has to repair an electric fault on a pole of height 5 m. She needs to reach to a point on the pole of 1.3 m below the top of the pole to undertake the repair work. What should be the length of the ladder that she should use which, when inclined at angle of 60
$\xb0$
from the horizontal, would enable her to reach the required position? Further, how far from the foot of the pole should she place the foot of the ladder?
What value is indicated from the question?
Answer
2
Atul Gupta
Subject: Maths
, asked on 9/1/18
Q 26
Answer
2
Riya Vardhan
Subject: Maths
, asked on 8/1/18
$Ifaroundballoonofradius\text{'}a\text{'}metressubtendsanangle\theta attheeyeofanobserverwhiletheangle\phantom{\rule{0ex}{0ex}}ofelevationofitscentreis\varphi ,thentheheightofthecentreoftheballoonis\phantom{\rule{0ex}{0ex}}A)a\mathrm{sin}\frac{\varphi}{2}\mathrm{cos}ec\theta \phantom{\rule{0ex}{0ex}}B)\frac{a}{2}\mathrm{sin}\varphi \mathrm{cos}ec\frac{\theta}{2}\phantom{\rule{0ex}{0ex}}C\left)\frac{a}{2}\mathrm{sin}\frac{\varphi}{2}\mathrm{cos}ec\theta \phantom{\rule{0ex}{0ex}}D\right)a\mathrm{sin}\varphi \mathrm{cos}ec\frac{\theta}{2}\phantom{\rule{0ex}{0ex}}E)Noneofthese$
Answer
2
Son Ser
Subject: Maths
, asked on 8/1/18
Plzz fast i have exams tomorrow. Dont provide any link plzzz. Prove it.
Q).
$\frac{\mathrm{sin}\theta +1-\mathrm{cos}\theta}{\mathrm{cos}\theta -1+\mathrm{sin}\theta}=\frac{1+\mathrm{sin}\theta}{\mathrm{cos}{\displaystyle \theta}}$
Answer
2
Sameer Ahmed
Subject: Maths
, asked on 6/1/18
Plz solve the problem with diagram
Q4. A pole projected outwards and upwards from a window at height of 8 m above the ground level, makes an angel of 30° with the wall. If angle of elevation of base and top of the pole, from a point on the ground level, is 30° and 60°respectively, find the length of the pole.
Answer
1
Son Ser
Subject: Maths
, asked on 6/1/18
$\frac{\mathrm{cos}\mathrm{\theta}-\mathrm{sin}\mathrm{\theta}+1}{\mathrm{cos}\mathrm{\theta}+\mathrm{sin}\mathrm{\theta}-1}=\mathrm{cosec}\mathrm{\theta}+\mathrm{cot}\mathrm{\theta}$
Answer
1
Son Ser
Subject: Maths
, asked on 6/1/18
sectheta -tantheta=1 then find theta where theta is acute angle. Plzz fast i have exams 2moro.
Answer
2
Subhangi Bhattacharjee
Subject: Maths
, asked on 1/1/18
Plzz help me out with this sum.
Answer
2
Yasmine
Subject: Maths
, asked on 25/12/17
two boats are approaching a light house in mid sea in opposite direction. the angles of elevation of the light house from the top of the light house from two boats are 30 degree and 45 degree resp. if the distance between the two boats is 200 m find the height of the light house .
Answer
2
Yasmine
Subject: Maths
, asked on 24/12/17
a contractor construct a vertical pillar of horizontal distance of 300 m from a fixed point. it was decided that the angle of elevation of the top of the complete pillar from that point to be 60 degree. he finished the job by making the pillar such that the angle of elevation of its top was 30 degree. find the height of the pillar to be increased as per the terms of contract.
Answer
3
Raghav Agrawal
Subject: Maths
, asked on 24/12/17
Solve Q49:
49. A regular polygon is inscribed in a circle. If the side subtends an angle of 72
^{o}
at the centre. Then the number of sides of the polygon is.
(A) 4 (B) 5 (C) 6 (D) 7
Answer
1
Son Ser
Subject: Maths
, asked on 20/12/17
Plzz fast i have exams tomorrow
Q).
$\mathrm{sin}x\mathrm{cos}x=a$
Find
${\mathrm{sin}}^{4}x+{\mathrm{cos}}^{4}x+{\mathrm{sin}}^{6}x+{\mathrm{cos}}^{6}x$
in terms of a.
Answer
1
Son Ser
Subject: Maths
, asked on 18/12/17
$\left(i\right)\mathrm{tan}\theta -cot\theta =aand\mathrm{cos}\theta +\mathrm{sin}\theta =bthaneliminate\theta .$
Answer
1
Harish R
Subject: Maths
, asked on 15/12/17
Rohan is standing in the balcony of his house.He notices a girl playing outside his house at a horizontal distance of 15 m from him.The girl's angle of depression from Rohan's eyes is 30
^{o}
.
What is the height of balcony from the ground?
Answer
2
Harsh
Subject: Maths
, asked on 13/12/17
Question 27 Answer with proper steps:
The angle of elevation of the top Q of a vertical tower PQ from a point of X on the ground is
${60}^{0}$
. From a point Y, 40m vertically above X , the angle of elevation of the top Q of the tower is
${45}^{0}$
. Find the height of the tower PQ and the distance PX .
(
$Use\sqrt{3}=1.73$
)
Answer
2
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Q.26. Anjali in an electrician and she has to repair an electric fault on a pole of height 5 m. She needs to reach to a point on the pole of 1.3 m below the top of the pole to undertake the repair work. What should be the length of the ladder that she should use which, when inclined at angle of 60$\xb0$ from the horizontal, would enable her to reach the required position? Further, how far from the foot of the pole should she place the foot of the ladder?

What value is indicated from the question?

Q). $\frac{\mathrm{sin}\theta +1-\mathrm{cos}\theta}{\mathrm{cos}\theta -1+\mathrm{sin}\theta}=\frac{1+\mathrm{sin}\theta}{\mathrm{cos}{\displaystyle \theta}}$

Q4. A pole projected outwards and upwards from a window at height of 8 m above the ground level, makes an angel of 30° with the wall. If angle of elevation of base and top of the pole, from a point on the ground level, is 30° and 60°respectively, find the length of the pole.

49. A regular polygon is inscribed in a circle. If the side subtends an angle of 72

^{o}at the centre. Then the number of sides of the polygon is.(A) 4 (B) 5 (C) 6 (D) 7

Q). $\mathrm{sin}x\mathrm{cos}x=a$

Find ${\mathrm{sin}}^{4}x+{\mathrm{cos}}^{4}x+{\mathrm{sin}}^{6}x+{\mathrm{cos}}^{6}x$ in terms of a.

^{o}.What is the height of balcony from the ground?

The angle of elevation of the top Q of a vertical tower PQ from a point of X on the ground is ${60}^{0}$ . From a point Y, 40m vertically above X , the angle of elevation of the top Q of the tower is ${45}^{0}$. Find the height of the tower PQ and the distance PX .

($Use\sqrt{3}=1.73$)