Rewrite with only sin x and cos x.
-$\cos 2 x - \sin x$
A) $\cos ^ { 2 } x + \sin ^ { 2 } x + \sin x$
B) $\cos ^ { 2 } x - 3 \sin x$
C) $\cos ^ { 2 } x - \sin ^ { 3 } x$
D) $\cos ^ { 2 } x - \sin ^ { 2 } x - \sin x$

Question

Quizplus · Accepted Answer

The expression $\cos 2x - \sin x$ can be rewritten using the double angle formula for cosine, $\cos 2x = \cos^2 x - \sin^2 x$, resulting in $\cos^2 x - \sin^2 x - \sin x$.

Rewrite with Only Sin X and Cos X cos⁡2x−sin⁡x\cos 2 x - \sin xcos2x−sinx

Rewrite with Only Sin X and Cos X $\cos 2 x - \sin x$