Using Fourier's trick, derive the coefficients (cn) of a Fourier series for a square pulse: lim x-2 (3x 2  -5x+2) must show all work evaluate the trigonomic value of tan(15deg) using trigonomic...

Using Fourier's trick, derive the coefficients (cn) of a Fourier series for a square pulse:

lim x-2 (3x² -5x+2)

must show all work

evaluate the trigonomic value of tan(15deg) using trigonomic values of 15deg= 45deg - 30deg.

tan(15deg)=