Answer
$x=\displaystyle \arccos\frac{y}{5}$
Work Step by Step
The goal is to isolate x. Divide with 5...
$\displaystyle \frac{y}{5}=\cos x\qquad$ use the definition of arccos
$\displaystyle \arccos\frac{y}{5}=x$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 7 - Trigonometric Identities and Equations - 7.7 Equations Involving Inverse Trigonometric Functions - 7.7 Exercises - Page 728: 7
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