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Alenka2409
@Alenka2409
July 2022
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Чему равен cos a/2, если sin a= (Корень из 63)/8?
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manyny06
Verified answer
Cos α\2= √(1+cosα)\2
cosα = √(1-sin²α) = √(1- (√63\8)² = 1\8
cos α\2 = √(1+1\8) \2 = 3\4
2 votes
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julyap
Если а ∈ I
а если a∈ II то
0 votes
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Answers & Comments
Verified answer
Cos α\2= √(1+cosα)\2cosα = √(1-sin²α) = √(1- (√63\8)² = 1\8
cos α\2 = √(1+1\8) \2 = 3\4
а если a∈ II то