1. The problem statement, all variables and given/known data I am trying to find parametric representation of the right surface of a sphere which was cut along the line y=5. x^2 + y^2 + z^2 = 36 2. Relevant equations 3. The attempt at a solution x^2 + y^2 + z^2 = 36 This is an equation of a sphere with radius given by: r^2 = 36 r=6 x= r cos(theta)sin(phi) y= r sin(theta)sin(phi) z= r cos(theta) sub x,y,z into original equation to get function with theta,phi as parameters. Have is the correct way to start? if so, how do I proceed?