# signals and systems

Joined Aug 10, 2008
1
Huy guys....have the following questions from signals and systems....

Determine whether the following signals is periodic...If it is periodic determine its fundamental period....

a) 2cos(9t+pi/6)
b) x(t) = sin^2(t-pi/6)
c)x[n] = cos((pi*n^2)/8)
d)x[n] = 5sin((3pi/8)*n) + 3cos((pi/6)*n)

I have attached the file with the questions.....

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#### roddefig

Joined Apr 29, 2008
149
See [post]78406[/post].

#### silvrstring

Joined Mar 27, 2008
159

#### roddefig

Joined Apr 29, 2008
149
What do you mean?

Edit: Ack, sorry, I thought silvrstring was the OP. Disregard my question.

Last edited:

#### blazedaces

Joined Jul 24, 2008
130
Huy guys....have the following questions from signals and systems....

Determine whether the following signals is periodic...If it is periodic determine its fundamental period....

a) 2cos(9t+pi/6)
b) x(t) = sin^2(t-pi/6)
c)x[n] = cos((pi*n^2)/8)
d)x[n] = 5sin((3pi/8)*n) + 3cos((pi/6)*n)

I have attached the file with the questions.....