00:01
For this question, we're asked to solve a tangent of 225 degrees using reference angles.
00:13
So let's graph 225 degrees so it's easier to find where the reference angle is.
00:19
We have zero degrees here, 90 degrees, 180 degrees, 270 degrees, and a full circle would give us 360 degrees here.
00:32
So 225 degrees, so that's supposed to be 270 degrees.
00:38
So 225 degrees would be somewhere in the third quadrant.
00:43
So this angle right here is 225 degrees.
00:47
And the reference angle we're trying to find is this angle right there.
00:52
So if it's in the third quadrant to find the reference angle, we can simply do 225 degrees minus 180 degrees, which would give us 45 degrees.
01:06
So our new problem we're solving for is the tangent of 45 degrees...