Answer
(a) $\frac{5\pi}{3}$
(b) $-\frac{\pi}{10}$
Work Step by Step
To convert from degrees to radians, we multiply the angle by $\frac{\pi}{180}$.
(a) $300\times \frac{\pi}{180} = \frac{5\pi}{3}$
(b) $-18\times \frac{\pi}{180} = -\frac{\pi}{10}$