You can put this solution on YOUR website! sinx/1-cosx is equivalent to
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multiply numerator and denominator by 1+cosx to get:
= [sinx(1+cos(x)]/[1-cos^2(x)]
= [sinx(1+cos(x)]/sin^2(x)
= (1+cos(x))/sin(x)
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Cheers,
Stan H.