Calculating time period of cos(pi/8 n*n)

AI Thread Summary
The signal cos(pi/8 n*n) is not periodic due to the n squared term, which complicates its behavior compared to typical cosine functions dependent on n. Users suggest checking the function's graph on Wolfram Alpha for better understanding. Writing out the first several terms can help clarify the lack of periodicity. The confusion primarily stems from transitioning from continuous time functions to discrete time sequences. Overall, the consensus is that the function does not exhibit periodic characteristics.
tina_singh
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can some one please help me calculate the time period of the signal cos(pi/8 n*n).
 
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actually what really confuses me is the term n square..i hav solved similar questions where cos was a function of n(t in continuous time).

please help me with this question..
i will be really greatful
 
tina_singh said:
actually what really confuses me is the term n square..i hav solved similar questions where cos was a function of n(t in continuous time).

please help me with this question..
i will be really greatful

It seems like that this function is not periodic. Enter this in wolfram alpha, check out the graph.
 
tina_singh said:
actually what really confuses me is the term n square..i hav solved similar questions where cos was a function of n(t in continuous time).

please help me with this question..
i will be really greatful

Write out the first dozen or so terms, then the periodicity will become apparent.
 

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