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kimu
@kimu
July 2022
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Какой ответ правильный и почему? Пожалуйста помогите!(
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Mashenkamizani
Формула, по которой мы найдем соs:
√((X₁-X₂)² + (Y₁-Y₂)² + (Z₁-Z₂)²) * √((X₁-X₃)² + (Y₁-Y₃)² + (Z₁-Z₃)²) * cos(α) = √((1-1)² + (5-4)² + (2-3)²) * √((1-3)² + (5-5)² + (2-3)²) * cos(α) = √2*√5*cos(α) = √10cos(α)
cos(α) = 1/sqrt(10)
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Answers & Comments
√((X₁-X₂)² + (Y₁-Y₂)² + (Z₁-Z₂)²) * √((X₁-X₃)² + (Y₁-Y₃)² + (Z₁-Z₃)²) * cos(α) = √((1-1)² + (5-4)² + (2-3)²) * √((1-3)² + (5-5)² + (2-3)²) * cos(α) = √2*√5*cos(α) = √10cos(α)
cos(α) = 1/sqrt(10)