Answer
$y'=\pi\cos{\pi x}.$
Work Step by Step
$u=\pi x$; $\dfrac{du}{dx}=\pi$
$\dfrac{dy}{du}=\cos{u}$
$\dfrac{dy}{dx}=\dfrac{dy}{du}\times\dfrac{du}{dx}=\pi\cos{\pi x}.$
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 2 - Differentiation - 2.4 Exercises - Page 136: 44
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