Answer
$-\sin x\cos \left( \cos x\right) $
Work Step by Step
$y=\sin \left( \cos x\right) =y'=\cos \left( \cos x\right) \times \left( \dfrac {d}{dx}\left( \cos x\right) \right) =-\sin x\cos \left( \cos x\right) $
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Chapter 2 - Derivatives - Review - Exercises - Page 197: 20
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