Question

Rewrite with only sin x and cos x

Cos 2x+sin x

Answer 1

Answer:

Cos 2x+sin x =  cos x cos x - sin x sin x + sin x

Step-by-step explanation:

Cos 2x+sin x

use Trigonometric identities.

cos (2x) = cos (x + x) = cos x cos x - sin x sin x

Cos 2x+sin x =  cos x cos x - sin x sin x + sin x