Question

calcule o seno e cosseno de:
a)4π/3
b)π/2
c)7π/4

Answer 1

Resposta:

a)4π/3

 cos4π/3 = cos4.180/3 = cos720/3 = cos240 = cos60 = 1/2

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b)π/2

cosπ/2 = 0

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c)cos7π/4 cos7.180/4 = cos1260/4 = cos315 = cos45 = √2/2

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Explicação passo-a-passo: