Chapter 26, Problem 5P

Sketch the following nonsinusoidal waveforms with $\omega t$ as the abscissa:

1. $\text{i = 50 sin }\omega \text{t+25 sin 3}\omega \text{t}$
2. $\text{i = 50 sin }\alpha -25\text{ sin 3}\alpha$
3. $\text{i = 4 + 3 sin }\omega t+2\text{sin 2}\omega \text{t - 1sin 3}\omega t$