# How do you graph y=5cos4x?

Oct 18, 2016

graph{5cos(4x) [-10, 10, -6, 6]}

#### Explanation:

The graph of $y = \cos x$ is as follows:
graph{cosx [-10, 10, -6, 6]}

The graph of $y = \cos 4 x$ is that graph compressed along $O x$ with factor 4:
graph{cos(4x) [-10, 10, -6, 6]}

The graph of $y = 5 \cos x$ is that graph scaled along $O y$ with scale factor 5:
graph{5cos(4x) [-10, 10, -6, 6]}