Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 3 - Radian Measure and the Unit Circle - Section 3.1 Radian Measure - 3.1 Exercises - Page 98: 10

Answer

$\frac{2\pi}{3}radians$

Work Step by Step

In order to convert degree measures to radians, we must multiply the given degree measure by $\frac{\pi}{180}$ and simplify. $120^{\circ}=120\times(\frac{\pi}{180}radians)=\frac{120\pi}{180}radians=\frac{2\pi}{3}radians$
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