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Re: Help with differential equation
Posted:
Sep 6, 2010 6:36 AM


You need cos[y[x]].
Raul Martinez On Sep 6, 2010, at 1:14 AM, mathpavi wrote:
> Dear experts, > I tried solving the following differential equation using DSolve: > > y' ' [x]+a( y' [x] ) = b( cos[y] ) > > But I got error message which asked me to provide proper arguments for > cos.. > So I changed cos[y] to cos[kx] and obtained solution... > However, I have to solve the equation by keeping cos[y] in order to > obtain a solution of relevance to my work. > Please help. > praveen >



