In general such equations cannot be solved symbolically.
You can try approximating these functions in a region
with polynomial taylor series, and then you have a system
of polynomial equations which may be easier to solve.
Tecnico Bonacini wrote:
> How could i solve system of non-linear equations (equations with
> sin(), cos(), log(), ....) with Maxima?
>
> In Maxima Primer there is only this example:
>
> solve([x+y+z=5,3*x-5*y=10,y+2*z=3],[x,y,z]);
>
>
> Thank you
>
> Best Regards
>
> Massimo