x (arctan(yx ))=yy2+x2 
 
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x (arctan(yx ))=yy2+x2 
  • steps
  • x (arctan(yx ))

  • Treat y as a constant

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    Apply the chain rule:    1(yx )2+1  x (yx )
    =1(yx )2+1  x (yx )

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    x (yx )=yx2 
    =1(yx )2+1 (yx2 )

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    Simplify 1(yx )2+1 (yx2 ):    yy2+x2 
    =yy2+x2 

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