1. The problem statement, all variables and given/known data Find the area of the region inside: r = 9 sinθ but outside: r = 1 2. Relevant equations 3. The attempt at a solution r = 9 sinθ is a circle with center at (0, 4/2) and radius 4/2 while r= 1 is a circle with center at (0, 0) and radius 1. The two curves intersect where sin(θ)= 1/9. For 0 ≤ θ ≤ π that is satified by θ=sin^-1(1/9) and θ=π-sin^-1(1/9). This is where i get lost setting up the differential for the area?