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अर्कज
Subject: Maths
, asked on 21/5/18
Solve this:
Q.1 In
∆
ABC
,
if
sin
2
A
2
-
sin
2
B
2
+
sin
2
C
2
+
2
cos
A
2
sin
the value of k is
(A) 1
(B) 2
(C) –1
(D) –2
Answer
1
अर्कज
Subject: Maths
, asked on 21/5/18
I
f
s
e
c
B
=
s
e
c
A
+
C
s
e
c
A
-
C
,
t
h
e
n
A
)
tan
A
,
tan
B
,
tan
C
a
r
e
i
n
A
.
P
.
B
)
tan
A
,
tan
B
,
tan
C
a
r
e
i
n
A
.
P
.
C
)
tan
A
,
tan
B
,
tan
C
a
r
e
i
n
G
.
P
.
D
)
tan
A
,
tan
B
,
tan
C
a
r
e
i
n
G
.
P
.
Answer
2
Kumar Rajesh
Subject: Maths
, asked on 21/5/18
Sin(180+x)cos (90+x )tan (270-x )cot (360-x)=sin (360-x)cos (360+x)-cosec x sin(270+x)
Answer
1
Kumar Rajesh
Subject: Maths
, asked on 21/5/18
Prove that. cosec (90+theta)+cot (450+theta)/cosec (90-theta)+tan (180-theta) +tan (180+theta)+sec (180-theta)/tan (360-theta)-sec(-theta)=2
Answer
2
अर्कज
Subject: Maths
, asked on 20/5/18
Solve this:
Q6. Which of the following expressions is equivalent to
cos
θ
cos
θ
2
-
cos
7
θ
2
cos
5
θ
?
A
cos
3
θ
2
sin
17
θ
2
B
1
2
cos
3
θ
2
sin
17
θ
2
C
1
2
sin
9
θ
sin
4
θ
D
sin
9
θ
2
sin
4
θ
Answer
1
अर्कज
Subject: Maths
, asked on 20/5/18
8
.
I
f
1
+
cos
2
x
+
y
-
cos
2
(
x
-
y
)
+
cos
2
x
cos
2
y
=
2
cos
2
λ
,
w
h
a
t
i
s
t
h
e
v
a
l
u
e
o
f
λ
?
A
)
x
B
)
y
C
)
x
+
y
D
)
x
-
y
Answer
1
अर्कज
Subject: Maths
, asked on 20/5/18
If
α
+
β
=
π
2
,
β
+
γ
=
α
and
tan
β
=
tan
π
4
-
γ
k
, then the value of
k
is
(A)
1
2
(B) 2 (C)
1
3
Answer
1
अर्कज
Subject: Maths
, asked on 20/5/18
Solve this:
Question No. 4
If A + B = 45
°
, then what is the simplified value of the expression, [(1 + tan A) (1 + tan B) + (1 - cot A) (1 - cot B)]?
A. 0
B. 1
C. 2
D. 4
Answer
1
अर्कज
Subject: Maths
, asked on 20/5/18
Solve this:
Q. Which of the following alternatives is correct ?
A
cot
3
x
cot
x
<
1
3
B
cot
3
x
cot
x
≥
1
3
C
cot
3
x
cot
x
>
1
3
D
cot
3
x
cot
x
≤
1
3
Answer
2
Dipesh Kumar Karesia
Subject: Maths
, asked on 20/5/18
cos(?-x)=-cosx.. if x=90 then cos(?- x) = cos 90 then how it is equal to - cos 90 ..plz explain..?
Answer
1
Dipesh Kumar Karesia
Subject: Maths
, asked on 20/5/18
cos(?-x)=-cosx.. if x=90 then cos(?-x) = cos 90 then how it is equal to - cos 90 ..plz explain..?
Answer
4
Isha
Subject: Maths
, asked on 19/5/18
solve cos-1(cos 10)
Answer
1
अर्कज
Subject: Maths
, asked on 19/5/18
Solve this :
Q
u
e
s
t
i
o
n
N
o
.
10
I
n
△
A
B
C
,
i
f
sin
2
A
-
sin
2
B
=
2
3
a
n
d
cos
2
A
+
cos
2
B
=
4
3
,
t
h
e
n
w
h
a
t
i
s
t
h
e
v
a
l
u
e
o
f
cos
2
C
?
A
.
4
9
B
.
5
9
C
.
8
9
D
.
1
9
Answer
3
अर्कज
Subject: Maths
, asked on 19/5/18
If tan θ = 5 tan β, then the maximum value of 20 tan
2
(θ – β) is
(A) 125 (B) 100 (C) 16 (D) 4
Answer
2
अर्कज
Subject: Maths
, asked on 19/5/18
Which of the following alternatives is correct?
(A)
cot
3
x
cot
x
<
1
3
(B)
cot
3
x
cot
x
≥
1
3
(C)
cot
3
x
cot
x
>
1
3
(D)
cot
3
x
cot
x
≤
1
3
Answer
1
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What are you looking for?
Q.1 In the value of k is
(A) 1
(B) 2
(C) –1
(D) –2
Q6. Which of the following expressions is equivalent to ?
(A) (B) 2 (C)
Question No. 4
If A + B = 45, then what is the simplified value of the expression, [(1 + tan A) (1 + tan B) + (1 - cot A) (1 - cot B)]?
A. 0
B. 1
C. 2
D. 4
Q. Which of the following alternatives is correct ?
(A) 125 (B) 100 (C) 16 (D) 4
(A) (B) (C) (D)