Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - 7.5 Inverse Circular Functions - 7.5 Exercises - Page 709: 58



Work Step by Step

Make sure that the setting for angles is "degrees". $\sec^{-1}x$ is evaluated as $\displaystyle \cos^{-1}(\frac{1}{x})$ Keys: "shift" or "2nd function" "cos" numerical keypad: (-1$\div$5.1180378) "=" yields $101.267354177^{o}$
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