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OpenStudy (anonymous):
(sinx/1-cosx)+(sinx/1+cosx)= 2 csc x proving the identity
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OpenStudy (welshfella):
Hint: the LCM of left side is 1 - cos^x which = sin^2 x
OpenStudy (welshfella):
let s = sinx and c = cos x |dw:1431376794603:dw|
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