00:01
There's a couple ways that you could get the correct answer.
00:04
One is just understanding that negative angles, so negative 7 pi over 4.
00:13
I don't really like that i did that way, but anyway, negative angles go clockwise.
00:17
So doing a full half of a turn would be just pi.
00:23
I can go ahead and put negative there, but with the same denominator, it would be 4 pi over 4, that's equal to pi.
00:29
So you have to keep going if you did another quarter turn, that's 6 pi over 4.
00:35
And then right here is where we're looking for our co -terminal.
00:40
I should have written negative 7 pi over 4 there.
00:44
Now the reason why that might be helpful is because if you did a, let me do scratchwork over here, a full negative 2 pi, that would equal negative 8 pi over 4.
00:55
And the reason why i'm bringing that to your attention is it might help you understand that the positive co -terminal would then be pi over four because that's all you have left from here to here to get to a full revolution.
01:11
The other way of doing this would be to do negative 7 pi over 4 plus 8 pi over 4 to get the co -terminal to be pi over 4...
