# Double integrals

squenshl
How do I find
J := $$\int\int_U y cos(x + y) dA$$
where U = {(x,y) $$\in$$ R2 : 0 $$\leq$$ x $$\leq$$ 2, 1-x $$\leq$$ x $$\leq$$ -2 + 2x}.

I drew the picture & i get 2 triangles but not sure what to do with them. Help please.