## Precalculus (6th Edition) Blitzer

$36^{\circ}$
The trigonometric ratios are as follows: $\tan \theta =\dfrac{opposite}{adjacent}$ We need to use a scientific calculator and press the inverse tangent function $\tan^{-1}$ Suppose $\tan \theta =\dfrac{125}{172}$ This gives: $\theta \approx 36^{\circ}$ So, the angle of elevation of the sun is approximately $36^{\circ}$