Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 6 - Review Questions - Page 501: 95



Work Step by Step

The range of $cos^{-1}~x$ is $[0,\pi]$. So, $cos^{-1}~1=0$, because $cos(0)=1$ and $0\leq0\leq\pi$
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