I have to evaluate the given surface integrals where S is the portion of the cone between the planes z = 1 and z = 2
I dont know where to start
The top and bottom are circles or radius 2 and 1 respectivily and can be parametrized using cylindrical polar coordinates.
Note that on the side the azimuthal angle is fixed at
So the surface can be parameterized as follows
So as a vector we get
Can you finish from here?