# Thread: Area and Polar Curve

1. ## Area and Polar Curve

Find the area enclosed by one loop of the following polar curve...

r=8cos(5theta)

I have no idea how to start this..can someone help?

2. Originally Posted by Jgirl689
Find the area enclosed by one loop of the following polar curve...

r=8cos(5theta)

I have no idea how to start this..can someone help?
double the area of half a loop ...

$2 \int_0^{\frac{\pi}{10}} 32\cos^2(5\theta) \, d\theta$