| Line 6: | Line 6: | ||
<math>E=\int_{t1}^{t2} |x(t)|^2\, dt</math> | <math>E=\int_{t1}^{t2} |x(t)|^2\, dt</math> | ||
| + | |||
| + | <math>E=\int_{0}^{5\pi} |\cos(4t)|^2\, dt</math> | ||
Revision as of 15:49, 4 September 2008
I assumed $ x(t)=\cos(4t) $ and time interval 0 to $ 5\pi $
Energy
$ x(t) = \cos(4t) $
$ E=\int_{t1}^{t2} |x(t)|^2\, dt $
$ E=\int_{0}^{5\pi} |\cos(4t)|^2\, dt $
