Spherical coordinates are the coordinates in a three-dimensional space, used to represent a point using three numbers. Learn complete description here at BYJU’S.
SphericalY(λ, μ, θ, φ) represents spherical harmonics, that is, the angular part of the solution to Laplace's equation in spherical coordinates (r,θ,φ). > Diff(r^2*Diff(f(r,theta,phi),r),r) + 1/sin(theta)*Diff(sin(theta)*Diff(f(r,theta,phi),theta),theta) + 1/sin...