Hi, I am trying to answer the following question:

Part a is easy, just bookwork. However, I'm finding verifying the theorem more challenging, particularly the line integral side of the formula.

I think my biggest problem is evaluating the line integral for the slanted planar surface. I can't think of how a parametrization could be used, and as far as other methods go I'm totally in the dark as to how to do this.

I'd really, really appreciate help with this problem.

Jon