Answer
$θ=arccos(\frac{4}{x})$
Work Step by Step
$cos~θ=\frac{adj}{hyp}$
$cos~θ=\frac{4}{x}$
$θ=arccos(\frac{4}{x})$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.6 - Inverse Trigonometric Functions - 6.6 Exercises - Page 484: 40
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