Looking for the equation in spherical coordinates and the spherical equation with the unit vectors: Frr + FӨӨ + FØØ = constant The equation is: x^2 + y^2 + z^2 = r^2 is the equation for a sphere radius = r centered at the origin. What is the cartesian equation? x*x + y*y + z*z = r ? What is the sphere in spherical coordianates? r*cosӨ*sinØ*r + r*sinӨ*sinØ /(r*sin)*Ө + r*cosØ/r*Ø = Constant ? or r*cosӨ*sinØ*r + sinӨ*Ө + cosØ*Ø =Constant ?