00:01
So if i'm talking about a radius of 25 and an angle of 335 degrees, what i'm really talking about is converting from polar to rectangular, x, y.
00:14
So what's the relationship between polar and rectangular? well, x -square plus y -squared equals r squared.
00:18
I also know that x equals r times cosine of theta, y equals r times sine of theta, and finally, tangent of theta equals y over x.
00:29
So these are all my equations relating polar to coordinate.
00:34
So polar to coordinate, i'm just going to do x equals r25 times cosine of 335 degrees.
00:41
Y is 25 times sine of 335 degrees.
00:45
Now on the unit circle, 335 degrees is in the fourth quadrant and has a reference angle of 25 degrees.
00:56
So this isn't on the unit circle...