#### Dx

V=double integral_R f(x,y)dA; f(x,y)= 3 + cos(x) + cos(y); 0<= x <= PI and 0 <= PI so V = integral PI ro 0 (integral PI to 0 (3 + cos(x) + cos(y))dy)dx = ???

I am using a example in my book but am stuck here or confused if I am going in the right direction. plz help?

Thanks!

Dx