Trigonometry Examples

$\tan (- x) \cos (- x)$

Step 1

Rewrite in terms of sines and cosines, then cancel the common factors.

Tap for more steps...

Step 1.1

Rewrite $\tan (- x) \cos (- x)$ in terms of sines and cosines.

$\frac{\sin (- x)}{\cos (- x)} \cos (- x)$

Step 1.2

Cancel the common factors.

$\sin (- x)$

Step 2

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

$- \sin (x)$