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JeremySAN
@JeremySAN
July 2022
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В треугольнике ABC угол C равен 90.BC = 4 корень из 21,AB = 20.Найдите sinB
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molkovan
SinB=кв.корень из (1-cosB^2)
cosB=BC/AB
sinB=кв.корень из(1-(4*корень21/20)^2)=0.4
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Answers & Comments
cosB=BC/AB
sinB=кв.корень из(1-(4*корень21/20)^2)=0.4