Homework Statement
[/B]
A simple pendulum with l = 9.8m satisfies the equation:
\ddot{\theta} + \sin{\theta} = 0
if \Theta_{0} = A
Show that the period T is given by:
T = \int_0^\frac{\pi}{2}\left(\frac{1}{(1 - \alpha \sin^2{\phi})^\frac{1}{2} }\right)d\phi
where...