Precalculus (6th Edition) Blitzer

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

Chapter 4 - Review Exercises - Page 643: 16



Work Step by Step

$\dfrac{31 \pi}{6}=930 °$ Subtract $720 ^{\circ}$ (twice $360^{\circ}$) from $\dfrac{31 \pi}{6}=930 ^{\circ}$ to find the positive co-terminal angle less than $360^{\circ}$. $930^{\circ}- 720^{\circ} =210^{\circ}=\dfrac{7\pi}{6}$
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