Chapter 12 - Section 12.6 - Radian Measure - Exercise - Page 417: 8

$15^o$

To convert radians to degree, multiply $\dfrac{180^o}{\pi \text{radians}}$ to the given radian measurement to obtain: \begin{align*} \dfrac{\pi}{12}\text{ rad} \cdot \dfrac{180^o}{\pi\text{ rad}}&=\dfrac{180^o}{12}\\\\ &=15^o\end{align*}