00:01
Okay, i put this here for you for us to use this reference.
00:03
A is wanting you to find the reference angle for 7 pi over 10.
00:08
Okay.
00:09
Well, this is, this is 180 or pi minus the angle.
00:23
The angle minus pi, and this would be 2 pi minus the angle.
00:31
Okay.
00:33
So 7 pi over 10.
00:35
Well, 5 over 10 is the same thing as 1 over 2, which would be pi over 2.
00:44
And pi over 2 is right here.
00:46
So 7 pi over 10 is somewhere in this quadrant.
00:52
We have to understand what quadrant is in so that we can understand.
00:58
Now we need to do pi minus 7 pi over 10.
01:05
Well, pi is the same thing as 10 pi over 10, because 10 over 10 is 1.
01:10
So the reference angle is going to be 3 pi over 10.
01:16
Your next angle is 11 pi over 8.
01:25
Okay.
01:28
So 8 over 8 equals 1.
01:40
12 over 8 would equal 1 .12 over 8 would equal 1 .5.
01:44
So that would be here...