## Precalculus (6th Edition) Blitzer

Step 1. Using the formula $tan\theta=\frac{h}{w}$ with $w=80, h=400$, we have $tan\theta=\frac{400}{80}=5$ Step 2. Within $(0,\frac{\pi}{2})$, we can find $\theta=atan(5)\approx79^\circ$ Step 3. As $\theta=79^\circ\gt63^\circ$, this person should not live on this street in order to avoid depression.