What does the first term ‘a0‘ in the below stated expression of a line spectrum indicate?
x(t) = a0 + a1 cos w0 t + a2 cos2 w0t +……+ b1 sin w0 t + b2 sin w0 t + …..
Which type/s of Fourier Series allow/s to represent the negative frequencies by plotting the double-sided spectrum for the analysis of periodic signals?