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: 51

Answer

$113.500969724^{o}$

Work Step by Step

Make sure that the setting for angles is "degrees". Keys: "shift" or "2nd function" "cos" numerical keypad: -0.39876459 "=" yields $113.500969724^{o}$
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