Предмет: Математика, автор: hercal1998

Упростить sin(П-a)*ctg(П/2-a)*cos(2П-a)/tg(П+a)*tg(П/2+2)*sin(-a)=sina

Ответы

Автор ответа: Marusya4460
0
sina*tga*cosa/tga*ctga*sina=sina
(идет сокращение и остается):
cosa/ctga=sina
cosa*sina/cosa=sina
(снова сокращение)
sina=sina

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