- #1
MozAngeles
- 101
- 0
Homework Statement
length of curve r=(1+cos(2 theta))^(1/2) from -pi/2..pi/2
Homework Equations
L= integral sqrt(r2+(dr/d(theta))2
dr/d(theta)= -sin(2theta)-sin(2theta)cos(2theta)
The Attempt at a Solution
this integral seems ways to complicated is there something to simplify it?
dr/d(theta)= -sin(2theta)-sin(2theta)cos(2theta)
then squaring it and adding (1+cos(2 theta))
seems really hard to integrate. So if someone could point out what I'm doing wrong, that would be nice. thanks.