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arinka222
@arinka222
August 2022
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в треугольнике авс угол с равен 90 tga=3/4 найдите cosb
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helloh497
Verified answer
Т. к. tgA=3/4, то ВС=3х, АС=4х, отсюда по т. Пифагора АВ=5х
sinA=BC/AB=3x/5x=3/5=0.6
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arinka222
надо найти cosb
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Answers & Comments
Verified answer
Т. к. tgA=3/4, то ВС=3х, АС=4х, отсюда по т. Пифагора АВ=5х
sinA=BC/AB=3x/5x=3/5=0.6