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Find $y'$ if $\sin(x+y) = \cos(xy)$. I got ${-\cos(x+y)\over \sin(xy) * (x+y)}$. Please use Implicit Differentiation. Did I get the answer right?

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    ok ${-ysin(xy)-cos(x+y)\over cos(x+y)+xsin(xy)}$ correct?2012-10-16
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    It is fine now.2012-10-16

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