Re: solve ODE help?

*To*: mathgroup at smc.vnet.net*Subject*: [mg72112] Re: [mg72089] solve ODE help?*From*: "Chris Chiasson" <chris at chiasson.name>*Date*: Wed, 13 Dec 2006 06:38:27 -0500 (EST)*References*: <200612110955.EAA07170@smc.vnet.net>

use NDSolve or DSolve On 12/11/06, learner <freephys at gmail.com> wrote: > Hi, everyone, > i am new to solve ode in mathematica. i am trying to solve two > odes(not for hw :)). > y'+ytan(x)=sin(2x) > > I use: NSolve[{Direvative[1][y][x]+y Tan[x]==Sin[2x]},y,x] > > and get reply saying that: > InverseFunction::ifun: Inverse functions are being used. Values may be > lost for multivalued inverses > > {{y[x]->cot[x](sin[2x]-y'[x]}} , > the mathematica did not solve the equation?? > > Furthermore, I add condition that y==2 when x==0 by saying: > > NSolve[{Direvative[1][y][x]+y Tan[x]==Sin[2x],y[0]==2},y,x] > > but no help ? why? > thanks > > -- http://chris.chiasson.name/

**References**:**solve ODE help?***From:*"learner" <freephys@gmail.com>