Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 6 - Review Exercises - Page 291: 19



Work Step by Step

Ensuring that the calculator is in degree mode, we enter $\cos^{-1} (0.80396577)$ into the calculator and solve: $\cos^{-1} (0.80396577)\approx36.49^{\circ}$
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