Question

If y=xcosy+ycosx find dx/dy

Answer 1

xcosy((cosy)/x−y′(siny)(lnx))+ycosx((cosx)y′/y−(sinx)(lny))=0
xcos⁡y((cos⁡y)/x−y′(sin⁡y)(ln⁡x))+ycos⁡x((cos⁡x)y′/y−(sin⁡x)(ln⁡y))=0.

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