Thread: Area Between Polar Curves

theta = x
Find the area between the polar curves : r= 2-2cos(x) and r = -2.75cos(x)

i know the formula is

.5* Int( r1^2- r2^2, x, ?, ?)


I just dont know what the bounds are. since the graph seems to touch at only one point.

Help is appreciated.

You can find the bounds like you do for integrals in Cartesian coordinates. Set the two expressions equal to each other.

It is the region between a circle and a cardioid. The following figure might help.