## Precalculus (6th Edition) Blitzer

$38 feet$
The trigonometric ratios are as follows: $\sin \theta= \dfrac{opposite}{hypotenuse}$ ; $\cos \theta= \dfrac{Adjacent}{hypotenuse}$ and $\tan \theta= \dfrac{Opposite}{Adjacent}$ Let $\theta$ be the angle of elevation. Now, $\tan \theta= \dfrac{Opposite}{Adjacent}$ This gives: $\tan 25.6^{\circ}= \dfrac{h}{80}$ So, $h=80 \times \tan 25.6^{\circ} =38 feet$