00:01
For the regular cosine function, sometimes we call it the parent graph, it would start up at 0 .1, and it goes down to negative 1, and then back up.
00:16
And the length of a normal period would be 2 pi.
00:19
So it takes 2 pi radiance before you get back to 1.
00:22
So what's different as we look at y equals 1 3rd cosine of 8x? well, this one -third is what we call the amplitude.
00:37
And so instead of going up to one, we're only going to go up one -third.
00:41
Now, it's kind of hard for me to graph one -third.
00:45
So i might just exaggerate a little bit that right here is one -third.
00:52
But on the other side, same thing, is instead of going down to negative one, we're only going down to one -third...