Question

expresse em radianos 30 °

Answer 1

Graus    Radianos
180°    =     pi
20°             x

180° x = 30° * rad

x= 30° * pi
        180°

x=  1pi
       6

Answer 2

Garus Rad
30 graus x
180 graus pi*rad

30graus*pi*rad = 180x
X= 30graus*pi*rad/180graus
X= pi/6 rad