## anonymous 5 years ago model & compute the length L of the cardioid whose polar model is r(0)=2-2cos(0), 0<0<2pie

1. anonymous

$dr/d \theta = 2\sin \Theta = L = \int\limits_{0}^{2\Pi}\sqrt{r^2*dr/d \theta}$

2. anonymous

$L=\int\limits_{0}^{2\Pi}(2-2\cos \theta)^2*2\sin \theta$

3. anonymous

$L=\int\limits_{0}^{2\Pi}\sqrt{(2-2\cos \theta)^2*2\sin \theta)}$