Little query regarding Fourier Transform.

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SUMMARY

The discussion revolves around the Fourier Transform, specifically the equation involving the rectangular function rect(t/2) and its relationship to the sinc function. The transformation of f(t+3) + f(t-3) results in the expression 4 sinc(w) cos(3w), which raises questions about the derivation of this result. Participants emphasize the need for clarity in problem statements to facilitate effective assistance.

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Peon666
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Here's a question solved:

rect (t/2) = 2 sinc (w)

T=3:

f(t+3)+f(t-3) <=> 4 sinc (w) cos 3w

I don't understand how "4 sinc (w) cos 3w" comes in the final answer. Is there any step missing?

Thanks.
 
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Peon666 said:
Here's a question solved:

rect (t/2) = 2 sinc (w)

Clearly those are not equal. And what is rect(t/2)?

T=3:

What is T?

f(t+3)+f(t-3) <=> 4 sinc (w) cos 3w

What is f(t)?

I don't understand how "4 sinc (w) cos 3w" comes in the final answer. Is there any step missing?

Thanks.

The final answer to what? What steps? If you would like people who volunteer their time to give help to answer you, you might take the time to state completely, carefully, and correctly what the problem is.
 

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