SOLUTION: compute dy/dx if: (a) sin y = cos 2x (b) x + sin y = xy

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Question 1197097: compute dy/dx if:
(a) sin y = cos 2x
(b) x + sin y = xy
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
system%28sin%28y%29=cos%282x%29%2Cx%2Bsin%28y%29=xy%29

Differentiate terme by term:





The left sides are equal, so we set the right sides equal

-2sin%282x%29=x%2Aexpr%28dy%2Fdx%29%2By-1

Solve that for dy%2Fdx.  You finish.

Edwin