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Hellenjesus
@Hellenjesus
December 2019
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Qual o cosseno de 165°(com a conta).
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diguidin
Cos165º=Cos(120+45):
Cos(120+45)=cos120.cos45-sen120.sen45
Cos(120+45)=-1/2.√2/2-√3/2.√2/2
Cos(120+45)=-√2/4-√6/4
Cos(120+45)=(-√2-√6)/4
Cos165º=-(√6+√2)/4
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Lista de comentários
Cos(120+45)=cos120.cos45-sen120.sen45
Cos(120+45)=-1/2.√2/2-√3/2.√2/2
Cos(120+45)=-√2/4-√6/4
Cos(120+45)=(-√2-√6)/4
Cos165º=-(√6+√2)/4