1. The problem statement, all variables and given/known data (Q) Find the outward flux of the field F=(3xy-x/(1+y^2 ))i+(e^x+tan^(-1)y )j across the cardioid r=a(1+cosθ), a>0. 2. Relevant equations div F = (∂M )/∂x+∂N/∂y 3. The attempt at a solution I could easily set up the double integral which is: ∬▒3 r^2 sinθ dA However, I am unsure as to how to determine the limits to be used. Please help. Thank-you.