00:01
Okay, so for our question, we want to figure out what the sign of negative 45 degrees is.
00:11
Let's start by graphing negative 45 degrees, and it is just going to be straight down here, like that, negative 45 degrees.
00:25
And the value of this is going to be cosine of 1 .5 degrees.
00:36
Negative 45, those in the parentheses, comma, sign of negative 45.
00:47
Now let's draw, let's figure out our reference angle.
00:50
It's pretty easy.
00:51
It's kind of just the same as the angle.
00:53
We want to use the x -axis, positive x -axis, and our angle.
01:01
And the value here is just zero of this angle.
01:06
So 45 minus zero...