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July 2021
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Tg(Pi/2+A)*cos(A-Pi)*sin(5Pi/2-A)//ctg(A+2Pi)*sin(Pi/2-A)*cos(3Pi/2+A
A альфа ok число пи
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pomoshnik09
По формулам приведения
=-ctgα*(-cosα)*cjsα/ ctgαcosα*sinα=cosα/sinα=ctgα
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=-ctgα*(-cosα)*cjsα/ ctgαcosα*sinα=cosα/sinα=ctgα