Simplify: sinxsinycosx+cosy+cosxcosysinx+ siny


Answer:

0

Step by Step Explanation:
  1. sinxsinycosx+cosy+cosxcosysinx+ siny=(sinxsiny)(sinx+siny)+(cosx+cosy)(cosxcosy)(cosx+cosy)(sinx+ siny)=sin2xsin2y+cos2xcos2y(cosx+cosy)(sinx+ siny)=11(cosx+cosy)(sinx+ siny)    [sin2θ+cos2θ=1]=0

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