Answer
$\csc^2 (\dfrac{x-1}{3})$
Work Step by Step
Need to solve.
$\dfrac{d(-3 \cot(\dfrac{x-1}{3})+C)}{dx}=(3)[\dfrac{1}{3 \sin^2 (\dfrac{x-1}{3})}]$
or, $=\csc^2 (\dfrac{x-1}{3})$
Thomas' Calculus 13th Edition
by Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0-32187-896-5
ISBN 13:
978-0-32187-896-0
Chapter 4: Applications of Derivatives - Section 4.7 - Antiderivatives - Exercises 4.7 - Page 239: 60
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