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1ValeriaCat11
@1ValeriaCat11
August 2022
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авс треугольник
угол в=30 градусов
угол с=105
ас=4 см
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alinka334
ВС=а;АС=в;АВ=с;<В=180-(30+45)=105°;по теореме синусов:sin105 / 8 =sin30 / b =sin45 / c; b=8sin30/sin105 = 4/sin105; c=4√2/sin105=√2 ·b; b=4/ sin(90+15)=4/cos15≈4/0,9613≈4,16 cм ; c=4,16·√2≈5,88 см
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