## Algebra and Trigonometry 10th Edition

$d=4767~ft$
Let $\theta$ be the angle between $d$, the hypotenuse, and the vertical side of the right triangle: $\theta=90°-39°=51°$ $cos~\theta=\frac{adj}{hyp}$ $cos~51°=\frac{3000}{d}$ $d=\frac{3000}{cos~51°}\approx4767$