Answer
Part A:
$\frac{\pi}{3}$,$\frac{2\pi}{3}$
Part B:
$\frac{\pi}{3}$,$\frac{2\pi}{3}$
Work Step by Step
Using the unit circle, two angles that work are:
Part A:
$\frac{\pi}{3}$,$\frac{2\pi}{3}$
Part B:
$\frac{\pi}{3}$,$\frac{2\pi}{3}$