>>648449019well it looks like the interval is:
{y=40t} between the interval-0.05 to 0.05,
so you could start with that, figure out the period which is like the frequency/2 or something, then use the a0 fourier intergral to get your a0 function, then either use the bn or an intertgral to solve for the rest. it's been ages since i have done this shit, so i'm a bit rusty.