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
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 6 - Inverse Circular Functions and Trigonometric Equations - Section 6.1 Inverse Circular Functions - 6.1 Exercises - Page 265: 61
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