Предмет: Математика, автор: Линда7856

sin а /1+cos а+ 1+cos а/sin а срочно нужно

Ответы

Автор ответа: Гоша68
0
sina/(1+cosa)+(1+cosa)/sina=(sin^2a+1+2cosa+cos^2a)/sina(1+cosa)=2(1+cosa)/sina(cosa+1)=2/sina
Автор ответа: Линда7856
0
спасибо
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