00:01
Determine an equation in terms of the cosine function for the given graph.
00:05
So if this is cosine, then it seems to be shifted about horizontally as well.
00:10
So first is always a good idea to find the amplitude and the time period.
00:14
So amplitude is about the midline.
00:17
The highest point is six.
00:19
The lowest point is zero.
00:21
So definitely the middle between six zero and six is three.
00:24
So this is the midline.
00:26
So the distance between midline and the maximum one.
00:30
Is the amplitude.
00:32
So this is 3.
00:33
This is minus 3.
00:34
So clearly the amplitude is 3.
00:37
So the equation is of the form, y is equal to a cost b times x plus c plus d.
00:46
So the value of midline is y equal to d and clearly that d like i already said midline is 3.
00:58
So this would imply that the value of d is 3.
01:01
So y equal to 3 is the much.
01:03
Midline...