ddx (xsin(x)+cos(x))=xcos(x)
 
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ddx (xsin(x)+cos(x))=xcos(x)
  • steps
  • ddx (xsin(x)+cos(x))

  • Apply the Sum/Difference Rule:    (f±g)=f ±g
    =ddx (xsin(x))+ddx (cos(x))

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    ddx (xsin(x))=sin(x)+xcos(x)
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    ddx (cos(x))=sin(x)
    =sin(x)+xcos(x)sin(x)

  • Simplify
    =xcos(x)

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