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Can't determine the correct integrating factor (DE)

  1. Apr 18, 2010 #1
    1. The problem statement, all variables and given/known data

    Solve (x+2)sin y dx + xcos y dy = 0 by finding integrating factor mu(x)

    2. Relevant equations

    i put equation in standard form to get integrating factor

    dy/dx + (x+2)sin y / x cos y = 0

    but dont i need to get the y out of the sin and cos somehow?

    so that y' + p(x)y = q(x)

    I could simplify into dy/dx + (x+2/x)tan y = 0 but not sure if that even helps.

    I am stuck please help, thanks

    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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