Resposta :
Cada 30° equivale a pi/6 radianos
a-30° = pi / 6 rad
b-15° = pi /12 rad
c-120° = 4 pi / 6 rad = 2 pi / 3 rad
d-210° = 7 pi / 6 rad
e-270° = 9 pi / 6 rad = 3 pi / 2 rad
f-300° = 10 pi / 6 rad = 5 pi / 3 rad
a-30° = pi / 6 rad
b-15° = pi /12 rad
c-120° = 4 pi / 6 rad = 2 pi / 3 rad
d-210° = 7 pi / 6 rad
e-270° = 9 pi / 6 rad = 3 pi / 2 rad
f-300° = 10 pi / 6 rad = 5 pi / 3 rad