If 0° ≤ A ≤ 360° find the possible measures for: a) cos A = - √3/2 and b) tan A = -1 ???

If 0° ≤ A ≤ 360° find the possible measures for:

a)cos A = - √3/2
b) tan A = -1

(Question A attached as a picture)
2 answers 2