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: 26



Work Step by Step

Let us consider $ \theta =\sin^{-1} (0.7)$ In order to get the answer in degrees, we need to put the calculator in degrees mode. Then, our result will be: $\theta \approx 44.4^{\circ}$ But, the angle $\theta$ does not belong to the interval, so we will compute the reference angle that lies in the given interval. Then we have: $\theta = 180^{\circ}- 44.4^{\circ}=135.6^{\circ}$
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