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`> (fft-test)`

fft-test : (SEND FFT-ITER :NEXT) = #(3.28013e-15 2.79029e-15 1.15578e-15 2.79029e 15 2.79029e-15 2.79029e-15 6.73636e-15 1.68587e-07 -16 2.79029e-15 -6.73636e-15 2.79029e-15 -2.79029e-15 2.79029e-15 -1.15578e-15 3.28013e-15 -0 2.79029e-15 1.15578e-15 2.79029e-15 2.79029e-15 2.79029e-15 6.73636e-15 -1.68587e-07 3.4366e-07 2.79029e-15 -6.73636e-15 2.79029e-15 -2.79029e-15 2.79029e-15 -1.15578e-15 3.28013e-15)

I copied and pasted the code from the tutorial, so I doubt there's a mistake on my part. Is -16 the correct result?

Also, the tutorial describes the FFT array as:

- the DC component goes in array element 0

- the Cosine part is in elements 2i - 1

- the Sine part is in elements 2i

- the Nyquist frequency component is in the last element

I'm not clear what the meaning of "cosine part" and "sine part" are. The array as shown above doesn't seem like it could be the coefficients for

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`SUM(Asin(2πnt) + Bcos(2πnt))`

Thanks for your assistance!