Question

Expresse em radianos 20°

Answer 1

π rad- 180°
x - 20°
180x= 20π rad
x= 20 π rad/ 180
x= π rad/ 9
πrad
——
9

Answer 2

1π = 180°

REGRA DE TRÊS SIMPLES: SE  1π ⇔ 180°
                                                              xπ ⇔ 20°
180°.xπ = 20°
xπ = 20°/180 ; SIMPLIFICANDO POR 20: xπ = 1/9

π ⇒ 1/9