How do you graph #y=5cos4x#?

1 Answer
Steve M
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 4x # is that graph compressed along #Ox# with factor 4:
graph{cos(4x) [-10, 10, -6, 6]}

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

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