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Diff eq.

  1. Apr 7, 2010 #1
    1. The problem statement, all variables and given/known data

    I integrated dx/dt = x^2+(1/81)

    2. Relevant equations

    My result; 9(arctan(9x))= t+C needed to be solved for initial condition x(0)=-8
    and fit into x(t) = format

    3. The attempt at a solution

    I cannot figure out why the computer is not accepting my solution:
    arctan (9x)= (t-14.012)/9
     
  2. jcsd
  3. Apr 7, 2010 #2
    Wouldn't that be:

    [tex]x(t)=\frac{(tan(\frac{t-14.012}{9}))}{9}[/tex]
     
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