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elnurshah
@elnurshah
September 2021
1
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Найдите косинус большого угла треугольника у которого стороны равны 8, 10, 13.
а) -1/32
б)1/32
с)-5/32
д)5/32
е)5/169
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Матов
Verified answer
Против большей стороны лежит больший угол
по теореме косинусов
13^2=8^2+10^2-2*8*10*cosa
cosa=-1/32
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Verified answer
Против большей стороны лежит больший уголпо теореме косинусов
13^2=8^2+10^2-2*8*10*cosa
cosa=-1/32