Use Greens Theorem to evaluate C F dr. (Check the orientation of the curve before

Use Green’s Theorem to evaluate ʃ_C F • dr. (Check the orientation of the curve before applying the theorem.)

F(x, y) = (y cos x - xy sin x, xy + x cos x), C is the triangle from (0, 0) to (0, 4) to (2, 0) to (0, 0)