D is girl, P is boy.

D: I found your sin.txt file on your desktop!
P: So what then?
D: Sin is sin in English! A lot of numbers there! Are you encrypting a password for a porn site? Or a dating site? Please explain quickly or we will break up.
Q: Sin is also a sinus, and in the file a set of pre-calculated sinus values to accelerate calculations. Used in my device for digital signal processing. There I calculate the correlation of these sinuses with the input signal, because I do not have limited resources to perform a quick fourier conversion, and the correlation gives quite acceptable results.
And here is what. If you can’t understand every word in my explanation for a week, we’ll break up. Dumb to fucking.