Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 6 - Test - Page 293: 2a



Work Step by Step

RECALL: $y=\arccos{x} \longrightarrow \cos{y}=x$ Note that: $\cos{(\frac{2\pi}{3})} = -\frac{1}{2}$ Thus, $y=\arccos{(-\frac{1}{2})}\longrightarrow y=\frac{2\pi}{3}$
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