00:01
Alright, looking at this situation, we have the equation y equals cosine x minus pi fourths.
00:06
First we need to identify the amplitude.
00:10
Keep in mind the amplitude is always related to our a value, in this case 1.
00:14
So our amplitude is 1.
00:18
The period of our graph is always related to our b value.
00:23
To get our period, we always do 2 pi over b.
00:27
B in this case is 1.
00:29
It's that coefficient of x.
00:32
So i know my period is 2 pi.
00:37
Looking at this next piece, what is the phase shift? well the phase shift is always that h value.
00:44
Since we have x minus h, our h is pi fourths, which means our phase shift is pi over 4.
00:54
As we go to graph, it's important to keep in mind that a cosine graph normally starts at its peak, goes down and comes back up.
01:02
However, this was shifted right pi fourths.
01:06
So you'll notice that my first point is actually going to be at pi fourths 1...