Precalculus (6th Edition) Blitzer

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

Chapter 4 - Mid-Chapter Check Point - Page 577: 5

Answer

a. $\frac{5\pi}{3}$. b. See figure. c. $\frac{\pi}{3}$
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Work Step by Step

a. Given the angle $\frac{11\pi}{3}=\frac{6\pi+5\pi}{3}=2\pi+\frac{5\pi}{3}$, we see that the positive angle that is less than $ 2\pi$ and is co-terminal with the given angle is $\frac{5\pi}{3}$. b. See figure. c. The reference angle can be found as $2\pi-\frac{5\pi}{3}=\frac{\pi}{3}$ (angle with respect to the x-axis)
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