00:01
And what i would probably do to start out this problem, it's implied that there's a parentheses here, is just break down everything.
00:14
And it's broken down in the directions as well.
00:17
Now, first of all, the amplitude needs to be positive.
00:20
So you just absolute value negative 3 and you get there.
00:24
And the period is not this number.
00:28
It's typically 2 pi divided by that number.
00:31
And i say typically because we're in a radian mode.
00:34
And these twos will cancel.
00:36
So the length of this period is actually pi.
00:39
And then the phase shift, i like to write ps for the phase shift, is i would just describe it that it's shifted right.
00:51
Because it has to be the opposite of this number, pi over 4 units.
00:59
And i don't know what else you would say about it.
01:01
It's a translation.
01:03
I don't know.
01:03
I don't know why they give you that much room.
01:06
But when you go to graph this, that's what i would do first is point out where pi over 4 is.
01:14
But this might be where you get kind of ugly.
01:17
Because i like to put in four tick marks.
01:21
And at the end of the fourth tick mark is the length of the period...