Algebra 2 (1st Edition)

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

Chapter 13, Trigonometric Ratios and Functions - 13.4 Evaluate Inverse Trigonometric Functions - 13.4 Exercises - Skill Practice - Page 878: 5


$\theta=\dfrac{\pi}{2}$ or $90^{\circ}$

Work Step by Step

We are given $\cos^{-1} (0)$ We know that the trigonometric function $\cos^{-1}$ has domain $[-1,1]$ and the range is: $[0, \pi]$. So, $\theta = \cos^{-1} (0) $ This implies that: $\theta=\dfrac{\pi}{2}$ or $90^{\circ}$
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