Help with Fourier transforms problem

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Belgium 12
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Hi members,

I have a problem with Fourier transforms.

There are two attached Pdf files.

My questions are on the Pdf files.Give me a little help.
Thank you

Belgium 12
 

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Do you know that [itex]sinh(x)= \frac{e^x- e^{-x}}{2}[/itex]? Changing everything into terms of exponentials should simplify these.
 

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