Answer
$\dfrac{11\pi}{6}$
and
$-\dfrac{3\pi}{4}$
Work Step by Step
In order to convert degrees into radains, we will multiply with $\dfrac{\pi}{180^{\circ}}$.
$330^{\circ} \times \dfrac{\pi}{180^{\circ}}=\dfrac{11\pi}{6}$
and
$-1350^{\circ} \times \dfrac{\pi}{180^{\circ}}=-\dfrac{3\pi}{4}$
