Re: Dsolve ODE

*To*: mathgroup at smc.vnet.net*Subject*: [mg13] Re: Dsolve ODE*From*: Steven Siew <stevensiew2 at gmail.com>*Date*: Sun, 25 May 2008 02:01:44 -0400 (EDT)*References*: <g18hoc$kft$1@smc.vnet.net>

On May 24, 5:57 pm, sokol <mirek.h... at gmail.com> wrote: > Hello, I've tried to solve 2nd order ODE with Dsolve but failed. > > In[1]: > DSolve[{y''[x] + Cot[x]*y'[x] + Sin[x]*y[x] == 0, > y[\[Pi]/2] == \[Alpha], y[(7*\[Pi])/8] == \[Beta]}, y[x], x] > > out[1]: > DSolve[{y''[x] + Cot[x]*y'[x] + Sin[x]*y[x] == 0, > y[\[Pi]/2] == \[Alpha], y[(7*\[Pi])/8] == \[Beta]}, y[x], x] > > Any hint? Thanks. I believe that your initial conditions are insufficient. I think you need y'[x1]==something y[x2]==something else for your initial conditions