Question

the given
1).
Select correct option from
alternatives.
1)
The value of sin (n+1) Asin (n+2) A +cos
(n+a) A cos (n+2) A is equal to
A) sin A B) cosA C) - cos A D) sin2A​

Answer 1

The value of sin(n+1) Asin(n+2) A + cos

(n+a) A cos(n+ 2) A is equal to sin2A

Answer:

D) sin2A

Plzz brainlist my answer

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