Find the Fourier series as far as the third harmonic, to represent the periodic function y, given by the values in the following table.
Use a spreadsheet to determine its parameters. Draw the graph of the waveform and explain your working out.
Derive the necessary formula/method to determine the effective value or RMS of a triangular wave. Use either a similar method to the class example of the RMS determination of the sinusoidal wave or any other appropriate method.