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ifeniks
@ifeniks
July 2022
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В треугольнике ABC угол С =90. tgA= корень из 15. найти sinB (ответ 0,25)
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yanaaleksandrov
TqA=V15
tqA=a/b =(V15)/1 a=V15 b=1
sinB=b/c
a^2+b^2=c^2
(V15)^2+1^2=c^2
15+1=c^2
16=c^2
c=4
sinB=1/4=0.25
3 votes
Thanks 8
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Answers & Comments
tqA=a/b =(V15)/1 a=V15 b=1
sinB=b/c
a^2+b^2=c^2
(V15)^2+1^2=c^2
15+1=c^2
16=c^2
c=4
sinB=1/4=0.25