Precalculus Examples

$\cos (\sin (- 1 x))$

Step 1

Rewrite $- 1 x$ as $- x$ .

$\cos (\sin (- x))$

Step 2

Since $\sin (- x)$ is an odd function, rewrite $\sin (- x)$ as $- \sin (x)$ .

$\cos (- \sin (x))$

Step 3

Since $\cos (- \sin (x))$ is an even function, rewrite $\cos (- \sin (x))$ as $\cos (\sin (x))$ .

$\cos (\sin (x))$