00:01
All right, so we have this vector c.
00:02
It has an x component of negative 210, which means it's 2 .1, sorry, 2 .10, negative 2 .10 in the negative x direction.
00:12
And it has a y component of negative 6 .7.
00:16
And we want to know the angle that it makes in the counterclockwise direction with the positive x axis.
00:27
So our c vector is going to be here.
00:31
And we want this angle right here.
00:34
So we're looking for that.
00:36
So the easiest way i know how to do this is first we just use inverse tangent to find this angle here.
00:46
So the y component here at negative 6 .7, this is going to be, this is going to form a right triangle.
00:56
And so if we use the inverse tangent of, so the tangent of this angle, we'll call this angle theta here and this angle of b.
01:02
So at theta, the tangent of theta is the opposite side over the adjacent side.
01:09
So cy over cx, the way that i've drawn this triangle...
