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: 53


(a) $\frac{8\pi}{3}$ $-\frac{4\pi}{3}$ (b) $\frac{23\pi}{12}$ $-\frac{25\pi}{12}$

Work Step by Step

(a) $\frac{2\pi}{3}+2\pi=\frac{2\pi}{3}+\frac{6\pi}{3}=\frac{8\pi}{3}$ $\frac{2\pi}{3}-2\pi=\frac{2\pi}{3}-\frac{6\pi}{3}=-\frac{4\pi}{3}$ (b) $-\frac{\pi}{12}+2\pi=-\frac{\pi}{12}+\frac{24\pi}{12}=\frac{23\pi}{12}$ $-\frac{\pi}{12}-2\pi=-\frac{\pi}{12}-\frac{24\pi}{12}=-\frac{25\pi}{12}$
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