## Precalculus (6th Edition) Blitzer

Step 1. From the given function $y=3sin(2x)$, we can identify its amplitude as $a=3$, its period as $p=\frac{2\pi}{2}=\pi$, and there is no phase shift. Step 2. We can graph the function for one period in $[0,\pi]$ as shown in the figure.