How do you find the amplitude of a cosine function?

1 Answer
Jul 21, 2018

Discussed below.


We should have a cosine function to talk about.
I will use #A*costheta#.

A plot of the basic cosine has a max value of 1 and a minimum of -1. Remember that a plot of the cosine is a wave. The magnitude of that wave is 1.

So for any value of #theta#, #"the amplitude of the cosine function " A*costheta = |A|#.

I hope this helps,