Answer
$x=arccos(\frac{y-4}{3})$
Work Step by Step
$y=4+3cosx$
$y-4=3cosx$
Divide both sides by 3.
$cosx=\frac{y-4}{3}$
Apply definition of arccos.
$x=arccos(\frac{y-4}{3})$
Hence, $x=arccos(\frac{y-4}{3})$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 6 - Inverse Circular Functions and Trigonometric Equations - Section 6.4 Equations Involving Inverse Trigonometric Functions - 6.4 Exercises - Page 280: 20
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