| Line 6: | Line 6: | ||
<br> K equals 3 results in a integer. | <br> K equals 3 results in a integer. | ||
<br><math>N = \frac{2\pi}{3\pi} 3 \,</math> | <br><math>N = \frac{2\pi}{3\pi} 3 \,</math> | ||
| − | <br><math>N = | + | <br><math>N = 2 \,</math> |
Revision as of 08:33, 25 September 2008
DT signal
$ X[n] = 3\cos(3 \pi n + \pi)\, $
Find a value for k that makes N an integer:
$ N = \frac{2\pi}{3\pi} K \, $
K equals 3 results in a integer.
$ N = \frac{2\pi}{3\pi} 3 \, $
$ N = 2 \, $
