Question

1) expresse em radianos: 210°

Answer 1

π--------180°
x---------210°
x=210°π/180
x=7/6π

Answer 2

180°  ⇒ π rad
210° ⇒ x

$x= \frac{210 \pi }{180} \\ \\ simplificar~~corta~~o~~zero~~e~~ \div3 \\ \\ x= \frac{21:3 \pi }{18:3} \\ \\ x= \frac{7}{6} \pi rad$