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dream666
@dream666
August 2022
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помогите
соs (квадрат) а-1=?
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nKrynka
Cos²α - 1 = cos²α - sin²α - cos²α = - sin²α
Если это уравнение, то решение будет таким:
cos²α = 1
1) cosα = - 1
α = π + 2πk, k∈Z
2) cosα = 1
α = 2πn, n∈Z
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Answers & Comments
Если это уравнение, то решение будет таким:
cos²α = 1
1) cosα = - 1
α = π + 2πk, k∈Z
2) cosα = 1
α = 2πn, n∈Z