Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 4 - Section 4.1 - Angles and Radian Measure - Exercise Set: 65

Answer

$\frac{3\pi}{5}$

Work Step by Step

$\frac{23\pi}{5}$ subtract two multiples of $2\pi$ from $\frac{23\pi}{5}$ to find the positive coterminal angle less than 2$\pi$. $\frac{23\pi}{5}$ - ($2\pi$ x 2) = $\frac{3\pi}{5}$
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