Предмет: Геометрия, автор: mashagood

треугольник авс ,угол с=90 градусов,ас=27,синус угла а =3/5 найти вс

Ответы

Автор ответа: EkZO29

$cosalpha=sqrt{1-9/25}=4/5$

$tgalpha=frac{BC}{AC}$

$BC=ACtgalpha$

BC=20,25

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