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Differential Equations PLEASE

  1. Sep 8, 2009 #1
    Differential Equations PLEASE!!

    **problem solved**
     
    Last edited: Sep 8, 2009
  2. jcsd
  3. Sep 8, 2009 #2

    nicksauce

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    Re: Differential Equations PLEASE!!

    It seems that you didn't multiply tan(x) with the -cos(x) term.
     
  4. Sep 8, 2009 #3
    Re: Differential Equations PLEASE!!

    i turned tan(x) into sinx/cosx and canceled out the cosx, and was left with

    -sin^2 x + cos^2 x + sinx + sin^2 x -cosx = cos^2 x

    any ideas?
     
  5. Sep 8, 2009 #4

    nicksauce

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    Re: Differential Equations PLEASE!!

    Like I said, you wrote:

    -sin^2 x + cos^2 x +sinx +[tan x] sinxcosx -cosx = cos^2x

    When it should be:

    -sin^2 x + cos^2 x +sinx +[tan x]( sinxcosx -cosx) = cos^2x
     
  6. Sep 8, 2009 #5
    Re: Differential Equations PLEASE!!

    aww, such a simple mistake, thanks a lot :)
     
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