Answer
$\lim\limits_{x\to\frac{\pi}{4}}\dfrac{4x}{\tan{x}}=\pi.$
Work Step by Step
$\lim\limits_{x\to\frac{\pi}{4}}\dfrac{4x}{\tan{x}}=\dfrac{4(\frac{\pi}{4})}{\tan{\frac{\pi}{4}}}=\pi.$
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 1 - Limits and Their Properties - Review Exercises - Page 91: 26
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