Which integral below represents the area of the region that lies inside r1 = 1 and 12 = 2 cos 0 . (here, inside means inside both - i.e. the mutual intersection) O 71 / 2 H 1 A + OP 2 2 .72 de IT / 3 O TT / 2 7/ 2 1 = ra de r2 do 7 / 6 O A 1 = 2 2 de 75 / 6 O TT / 2 A ride + 0 7 /6 O TT / 3 7 / 2 A = ride + r? do TT / 3