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albertmaksimov
@albertmaksimov
July 2022
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Геометрия 9-й класс. 10 баллов
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SliderTMB
Я бы решил так:
cosA=ac/ab=корень из 91 / 10 ----------> ас=корень из 91 ab=10
bc^2 + ac^2 = ab^2
bc^2=100-91
bc^2=9
bc=3
cosb=bc/ab = 3/10
1 votes
Thanks 1
albertmaksimov
спасибо
Kазак
Cos(B) = sin(A)
sin(A) = √(1-cos²(A)) = √(1-91/100) = √9/100 =
3/10
1 votes
Thanks 0
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Answers & Comments
cosA=ac/ab=корень из 91 / 10 ----------> ас=корень из 91 ab=10
bc^2 + ac^2 = ab^2
bc^2=100-91
bc^2=9
bc=3
cosb=bc/ab = 3/10
sin(A) = √(1-cos²(A)) = √(1-91/100) = √9/100 = 3/10