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Sinx+cosx=5, tanx+secx=3 then sinx=?

Sinx+cosx=5,tanx+secx=3

sinx=?

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Tanx= sinx/cosx,
secx=1/cosx
1+sinx/cosx=3
1+sinx=3cosx---------->1
cosx=5-sinx------------->2

sub 2 in 1
1+sinx=3(5-sinx)
1+sinx=15-3sinx
1+4sinx=15
4sinx=14
sinx=14/4...
this is the solution..

Posted on Jul 23, 2008

Sin180-x

Posted on Oct 22, 2008

5cos A +12sinA=4

Posted on Aug 30, 2008

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