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sirike
@sirike
July 2022
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найдите sin x, если cos x=5/13, 0
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RyashenkoNastya
Sin^2x=1-cos^2x
cos^2x=25\169
sin^2x=1-25\169=144\169
sin x=12\13
3 votes
Thanks 1
vunderkid
Если cos(x) равен 5/13, то
sin(x) равен 12/13, либо -12/13
если cos(x) равен 0,
то sin(x) равен либо 1 либо -1
0 votes
Thanks 1
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Answers & Comments
cos^2x=25\169
sin^2x=1-25\169=144\169
sin x=12\13
sin(x) равен 12/13, либо -12/13
если cos(x) равен 0,
то sin(x) равен либо 1 либо -1