Posted by Cole on .
Find the area inside the lemniscate r^2=150cos(2theta) and outside the circle r=5sqrt(3).
Please I really need help.

Math 
Steve,
find 0<α<π/4 where the curves intersect
Then, by symmetry,
a = 8∫[0,α] 1/2 (R^2r^2) dθ
where R=150cos2θ and r=5√3