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<math>x(t)=10cos(4\pi n + 2\pi)\!</math>
+
<math>x(t)=10cos(4\pi n + 2\pi)+5sin(2\pi n + 4\pi)\!</math>
  
In order to find the period of the signal below, we need to find the smallest value of K that will make N an integer.
+
In order to find the period of the signal below, we need to find a value of K that will make N an integer.
  
<math>N = \frac{2\pi}{\omega_0} K \!</math>
+
<math>N_1 = \frac{2\pi}{\omega_0} K \!</math>
  
<math>N = \frac{2\pi}{2\pi} K \!</math>
+
<math>N_1 = \frac{2\pi}{4\pi} K \!</math>
  
<math>N = \frac{2\pi}{2\pi} K \!</math>
+
<math>N_1 = 2K \!</math>
  
<math>N = K\!</math>
+
<math>N_2 = \frac{2\pi}{\omega_0} K \!</math>
  
So the smallest value that K can have is 1.
+
<math>N_2 = \frac{2\pi}{2\pi} K \!</math>
  
<math>K = 1\!</math>
+
<math>N_2 = K \!</math>
 +
 
 +
Since both numbers are integers before multiplying by K, we can just let K = 1.

Revision as of 11:57, 26 September 2008

$ x(t)=10cos(4\pi n + 2\pi)+5sin(2\pi n + 4\pi)\! $

In order to find the period of the signal below, we need to find a value of K that will make N an integer.

$ N_1 = \frac{2\pi}{\omega_0} K \! $

$ N_1 = \frac{2\pi}{4\pi} K \! $

$ N_1 = 2K \! $

$ N_2 = \frac{2\pi}{\omega_0} K \! $

$ N_2 = \frac{2\pi}{2\pi} K \! $

$ N_2 = K \! $

Since both numbers are integers before multiplying by K, we can just let K = 1.

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