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Ярославааа
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April 2022
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Помогите пожалуйста !!!! Упростите выражение sin(p/2-a)cos(p+a)/ctg(p+a)tg(3p/2-a)
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nKrynka
Решение
sin(p/2-a)cos(p+a)/ctg(p+a)tg(3p/2-a) =
= [cosa * (- cosa)] / [ctga * ctga] = - cos
²a / (cos²a/sin²a) = - sin²a
3 votes
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Answers & Comments
sin(p/2-a)cos(p+a)/ctg(p+a)tg(3p/2-a) =
= [cosa * (- cosa)] / [ctga * ctga] = - cos²a / (cos²a/sin²a) = - sin²a