4*cos750*tg390=4*cos(25*30)*tg(13*30)=4*V3/2*V3/3=4*3/6=12/6=2
Ответ 2
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4*cos750*tg390=4*cos(25*30)*tg(13*30)=4*V3/2*V3/3=4*3/6=12/6=2
Ответ 2