Chapter 7.3, Problem 4P

For each of the following combinations of a fundamental musical tone and some of its overtones, make a computer plot of individual harmonics (all on the same axes) and then a plot of the sum. Note that the sum has the period of the fundamental (Problem 5).

$\cos 2\pi t+\cos 4\pi t+\frac{1}{2}\cos 6\pi t$