Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 6 - 6.1 - Angles and Their Measure - 6.1 Exercises - Page 431: 52


(a) $\frac{19\pi}{6}$ $-\frac{5\pi}{6}$ (b) $\frac{\pi}{6}$ $-\frac{23\pi}{6}$

Work Step by Step

(a) $\frac{7\pi}{6}+2\pi=\frac{7\pi}{6}+\frac{12\pi}{6}=\frac{19\pi}{6}$ $\frac{7\pi}{6}-2\pi=\frac{7\pi}{6}-\frac{12\pi}{6}=-\frac{5\pi}{6}$ (b) $-\frac{11\pi}{6}+2\pi=-\frac{11\pi}{6}+\frac{12\pi}{6}=\frac{\pi}{6}$ $-\frac{11\pi}{6}-2\pi=-\frac{11\pi}{6}-\frac{12\pi}{6}=-\frac{23\pi}{6}$
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