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Silvania012
@Silvania012
November 2019
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Os valores do sen 150/ e cos 150/,valem respectivamente:
a) 0,5 e 0,866
B) 0,5 e - 0.866
c) - 0,5 e - 0,866
d) - 0,5 e 0,866
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jjzejunio
Olá!!!
Sen150° = sen (180° - 150°)
sen 30° = 1/2 => 0,5
Cos150° = -cos (180 - 150)
-cos 30° = -√3/2 => -0,866
Alternativa B)
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silvania012
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Sen150° = sen (180° - 150°)
sen 30° = 1/2 => 0,5
Cos150° = -cos (180 - 150)
-cos 30° = -√3/2 => -0,866
Alternativa B)