Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 13, Trigonometric Ratios and Functions - Chapter Review - Page 898: 4

Answer

$\cos^{-1}a$

Work Step by Step

If $0\leq\theta\leq\pi$ and $\cos\theta=a$, then $\cos^{-1}a=\theta$.
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