Question

Qual o valor 420° em radiano ? *

a)42π/3

b)7π

c)7π/2

d)21π/3

e)7π/3

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Answer 1

180 graus -- π rad

420 graus -- x

180 x = 420 π rad

x = 420 π rad / 180

x = 7 π / 3 (LETRA E)