#### Answer

$\sin x$

#### Work Step by Step

Using the given identities: $-\cos x\tan (-x)=-\cos x\frac{\sin(-x)}{\cos(-x)}=-\cos x\frac{-\sin x}{\cos x}=\sin x$

Chegg costs money, GradeSaver solutions are free!

Published by
McDougal Littell

ISBN 10:
0618595414

ISBN 13:
978-0-61859-541-9

$\sin x$

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.