September 2021 0 10 Report
Докажите тождество: 1) 1+tg(pi/2-a)*ctg(2pi-a)*cos(3pi/2+a)*tg(2pi+a)=2sin^2 a/2 Нужно на сегодня, помогите пожалуйста, заранее спасибочки, надеюсь на вашу помощь (а - это альфа)
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