Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 6 - Inverse Circular Functions and Trigonometric Equations - Section 6.1 Inverse Circular Functions - 6.1 Exercises - Page 259: 61

Answer

$1.9033723$ radian

Work Step by Step

Ensuring that the calculator is in radian mode, we enter $\cos^{-1} (-0.32647891)$ into the calculator and solve: $\cos^{-1} (-0.32647891)\approx1.9033723$ radian
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