Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 3 - Section 3.2 - Radians and Degrees - 3.2 Problem Set - Page 132: 39



Work Step by Step

We know that $\frac{2\pi}{3}=\pi-\frac{\pi}{3}$, because $\pi-\frac{\pi}{3}=(1-\frac{1}{3})\pi=(\frac{2}{3})\pi=\frac{2\pi}{3}$.
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