you can skip a few of the integral steps, I'm more worried in how you set up a and b

11. Compute the following integrals: (a) I cos(ry) dA where R = 10,2 x (0, 1 /8). 2r dA where D CR' is the triangle with vertices (1, 3), (2, 3), and (2, 0). (c) drdy (Hint: switch the order of integration, but be careful to use the same region of integration in R?!)