8.4 due Mon Dec 4 17

Difficult:

I don't fully understand the Nyquist frequency. Why would making the Fourier coefficients 0 after a certain k make things more accurate? I can see that they do, but I don't know why given that this is a periodic function.

Application:

As mentioned, aliasing and such are used with radio signals, digital image filtering, etc. I don't fully see how they work with digital signals, though.

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