Use basic identities to simplify the expression.
-$\cos \theta - \cos \theta \sin ^ { 2 } \theta$
A) $\sec ^ { 2 } \theta$
B) $\tan ^ { 2 } \theta$
C) $\cos ^ { 3 } \theta$
D) $\sin \theta$

Question

Quizplus · Accepted Answer

The expression can be simplified using the identity $1 - \sin^2\theta = \cos^2\theta$. Factor out $\cos\theta$ from the given expression to get $\cos\theta(1 - \sin^2\theta)$, which simplifies to $\cos\theta \cdot \cos^2\theta = \cos^3\theta$.

Use Basic Identities to Simplify the Expression cos⁡θ−cos⁡θsin⁡2θ\cos \theta - \cos \theta \sin ^ { 2 } \thetacosθ−cosθsin2θ

Use Basic Identities to Simplify the Expression $\cos \theta - \cos \theta \sin ^ { 2 } \theta$