Tardigrade
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Tardigrade
Question
Mathematics
If ( cot α+ cot (270°+α)/ cot α- cot (270°+α))-2 cos (135°+α) cos (315°-α)=λ cos 2 α, where α ∈(0, (π/2)), then λ=
Q. If
c
o
t
α
−
c
o
t
(
27
0
∘
+
α
)
c
o
t
α
+
c
o
t
(
27
0
∘
+
α
)
−
2
cos
(
13
5
∘
+
α
)
cos
(
31
5
∘
−
α
)
=
λ
cos
2
α
, where
α
∈
(
0
,
2
π
)
, then
λ
=
129
151
Trigonometric Functions
Report Error
A
0
B
1
C
2
D
4
Solution:
Correct answer is (c) 2