## Precalculus (6th Edition) Blitzer

$\dfrac{7\pi}{4}$
We have, $degree=315^{\circ}$ In order to find the result, we need to change degrees into radians by multiplying the given angle by $\dfrac{\pi}{180}$. $315^{\circ} \times \dfrac{\pi}{180}=\dfrac{7\pi}{4}$