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OpenStudy (anonymous):
Verify (1+cosx/sinx)+(sinx/1+cosx)=2cscx
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OpenStudy (raden):
hint : start from left side, use cross product like : a/b + c/d = (ad + bc)/bd then simplify
OpenStudy (anonymous):
|dw:1361439783443:dw|
OpenStudy (raden):
|dw:1361439917984:dw|
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