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May03
@May03
July 2022
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Помогите решить , а то я все забыла
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гюйс
Verified answer
(1-Sinα)(1+Sinα) -(Cos²α-5)=(1- Sin²α) -Cos²α+5=Cos²α - Cos²α+5=5
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okneret
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Применены : формула разности квадратов, формула зависимости синуса от косинуса
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Answers & Comments
Verified answer
(1-Sinα)(1+Sinα) -(Cos²α-5)=(1- Sin²α) -Cos²α+5=Cos²α - Cos²α+5=5Verified answer
Применены : формула разности квадратов, формула зависимости синуса от косинуса