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Homework Help: Differential Equations problem

  1. Oct 4, 2008 #1
    1. The problem statement, all variables and given/known data
    y=sinx cosx -cosx y'+(tanx)y=cos^2 x

    I know that I'm supposed to see if the Left hand side equals the Right hand side, but I'm having problems differentiating y=sinx cosx -cosx

    Yea believe it or not
    Last edited: Oct 4, 2008
  2. jcsd
  3. Oct 4, 2008 #2
    [tex]y=\sin x\cos x-\cos x[/tex] is a product

    Product rule: [tex](fg)'=fg'+gf'[/tex]
  4. Oct 4, 2008 #3
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