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Esnc
@Esnc
June 2022
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Olga0004
Прменяя формулу косинуса двойного угла ,получим 2*косинус в квадрате минус 1
квадрат косинуса равен 4/5
tg^2+1=1/cos^2
учитывая угол, ответ: : -0,5
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Answers & Comments
квадрат косинуса равен 4/5
tg^2+1=1/cos^2
учитывая угол, ответ: : -0,5