Question Number 76783 by mathmax by abdo last updated on 30/Dec/19
$${let}\:{f}\left({x}\right)={x}^{\mathrm{3}} \:\:\:\:,\mathrm{2}\pi\:{periodic}\:{odd}\:{developp}\:{f}\:{at}\:{fourier}\:{serie} \\ $$
let-f-x-x-3-2pi-periodic-odd-developp-f-at-fourier-serie-