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<math>f(t)=j*5*sin(t)</math> | <math>f(t)=j*5*sin(t)</math> | ||
| − | <math>E_\infty = \int_{-\infty}^\infty | | + | <math>E_\infty = \int_{-\infty}^\infty |5sin(t)|^2\,dt)</math> |
| − | <math>E_\infty = \int_{-\infty}^\infty | + | <math>E_\infty = \int_{-\infty}^\infty 25sin(t)^2u(t)\,dt)</math> |
<math>E_\infty = \int_{-\infty}^\infty 25(.5 + .5cos(2t)),dt)</math> | <math>E_\infty = \int_{-\infty}^\infty 25(.5 + .5cos(2t)),dt)</math> | ||
Revision as of 03:55, 22 June 2009
$ f(t)=j*5*sin(t) $
$ E_\infty = \int_{-\infty}^\infty |5sin(t)|^2\,dt) $
$ E_\infty = \int_{-\infty}^\infty 25sin(t)^2u(t)\,dt) $
$ E_\infty = \int_{-\infty}^\infty 25(.5 + .5cos(2t)),dt) $
$ E_\infty =\frac{t}{2} + frac{sin(t)}{4}\bigg]_-infty^\infty) $
$ E_\infty =\infty-0 = \infty $
