Answer
$\approx 35.8^{\circ}$
Work Step by Step
The trigonometric ratios are as follows:
$ \tan \theta =\dfrac{height}{hypotenuse}$
or, $ \tan \theta=\dfrac{18}{25} =0.72$
Then $\theta=\tan^{-1} (0.72) \approx 35.8^{\circ}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 4 - Section 4.7 - Inverse Trigonometric Functions - Exercise Set - Page 629: 128
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