Пошаговое объяснение:
120° = 120*π/180 = 2π/3
240° = 240*π/180 = 4π/3
300° = 300*π/180 = 5π/3
150° = 150*π/180 = 5π/6
120град=2/3пи
240град=4/3пи=1 1/3пи
300град=11/6пи=1 5/6пи
150град=5/6пи
