Revision as of 19:31, 2 September 2008 by Park1 (Talk)

x(t) = sin t

Energy

$ E=\int_0^{2\pi}{|sin(t)|^2dt} $
$ =\frac{\int_0^{2\pi}(1-cos(2t))dt}{2} $
$ =\frac{t-\frac{1}{2}sin(2t)}{2}|_{t=0}^{t=2\pi} $
$ \frac{1}{2}(2\pi-0-0+0) $
$ =\pi $

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