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>> No.10083709 [View]
File: 30 KB, 780x380, Fourier.png [View same] [iqdb] [saucenao] [google]
10083709

Why does the fourier transform of the equation on the top end up as this? I understand that the unit step funtion is where the limits come from, but I don't get why cosine(pi*t) ends up as 2cos(9*pi*t)

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