i wanted to solve an electrostatic problem that includes an infinite conical conductor whose vertex is the origin of the spherical coordinates, and i knew that the general solution of laplacian equation in spherical coordinates is: u(r,θ)=Ʃ(An*rn+Bn*r-n-1), n>=0 however, the boundary conditions on the cone prevents me from getting an overall analytical solution. the boundary conditions are that: u(+∞,θ)=0. u(r,θ0)=u0, where θ0 is the angle of the cone and u0 is the conductor's potential, which is a constant. anyone has some advice on solving this Dirichlet problem? thx.