Let f (x) = cos x and g(x) = sin x. find the center of gravity (x, y) of the region between the graphs of f and g on[0,π/2].

How do you find the center of gravity of the region between the graphs of f(x) = cosx and g(x) = sinx on [0, pi/2]? 

I got Msubx = 0, Msuby = -2, and Area = 0. But that can't be right, as that would make the center of gravity (-2/0, 0), and that's obviously wrong. I think it has something to do with the areas of cosx and sinx canceling out, but I don't know what to do with it - how do I not get an area of 0? Also, I suspect I made mistakes with Msubx and Msuby but can't figure out where.

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table