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: 54


(a) $\frac{5\pi}{4}$ $-\frac{11\pi}{4}$ (b) $\frac{\pi}{4}$ $-\frac{15\pi}{4}$

Work Step by Step

(a) $-\frac{3\pi}{4}+2\pi=-\frac{3\pi}{4}+\frac{8\pi}{4}=\frac{5\pi}{4}$ $-\frac{3\pi}{4}-2\pi=-\frac{3\pi}{4}-\frac{8\pi}{4}=-\frac{11\pi}{4}$ (b) $-\frac{7\pi}{4}+2\pi=-\frac{7\pi}{4}+\frac{8\pi}{4}=\frac{\pi}{4}$ $-\frac{7\pi}{4}-2\pi=-\frac{7\pi}{4}-\frac{8\pi}{4}=-\frac{15\pi}{4}$
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