- #1
iRaid
- 559
- 8
Homework Statement
Find the length of the curve [itex]y=2ln(sin\frac{1}{2}x)[/itex], [itex]\frac{\pi}{3}\leq x\leq\pi[/itex]
Homework Equations
The Attempt at a Solution
Alright so I figured out the derivative of y is cot(1/2)x so I put it into the arclength formula to get:
[tex]\int_{\frac{\pi}{3}}^{\pi} \sqrt{1+{cot^{2}(\frac{x}{2})}}dx[/tex]
But I don't know how to solve that.. Looking at wolfram it seems like a really ugly integral so I don't want to put a lot of effort into solving it if I have the integral wrong.
Thanks for any help.