# Homework Help: Discrete Fourier Transforms of Signals

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1. Oct 13, 2014

### mintsnapple

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

I'd like to see if I have the right line of thinking in my solutions:
a. The sampling frequency should be such that no aliasing or folding occurs, so it should be twice the frequency of the original signal.
$$x(t) = -17 -9sin(4\pi t) + 2.6sin(8\pi t) - 4cos(10\pi t)$$, I think sampled at 5Hz.
b. There should now be four samples...but which four samples should I plot?
c. There should be 2.5 samples right? Again how should I plot?

2. Oct 18, 2014