00:01
So we have a circular ski path of some sort here, and i'm going to draw in actually a very sloppy coordinate axis on here.
00:14
And what we know is that the radius of this thing is 3 .2 kilometers.
00:21
Make my pen a little different.
00:23
And we know that when the person is finished skiing, they begin right here.
00:28
And they're traveling counterclockwise, and when they stop traveling, they end up somewhere, something like this.
00:37
This distance here is 0 .57, and this distance here is 3 .1.
00:44
This is in kilometers.
00:46
And so if we were to create an angle right here, the question is, how many radians would that angle be? and the way i will handle that is simply to find this angle.
00:58
Angle here, which this is opposite, and this is adjacent, which is tangent.
01:03
So if we calculate the tangent inverse of 3 .1 over 0 .57, we don't have to worry about the sign at all, or the sense of that, 3 .1 divided by 0 .57, and it gives us approximately 1 .389 radiance.
01:28
So what we need to do, them is, oh, i'm wondering if i put in the wrong value here.
01:34
I think they gave us 3 .149.
01:39
So that'd be 149.
01:41
So it's going to change it just slightly...