00:01
All right guys, so we really know that 10 of theta equals 4.
00:04
So for question a, we're looking for second square theta.
00:08
So we do have this fundamental identity, right? 10 square of theta plus 1 would equal second square of theta.
00:17
So plug the value for 10 of theta in here, and then we'll find second square of theta.
00:25
So this right here, b 16 plus 1 equals second square of theta.
00:34
So 17 equals second square of theta.
00:41
Okay, so that is for question a.
00:45
For question b, we're looking for cotan.
00:49
We're looking for cotan data, right? okay, so cotan theta is simply 1 over 10 theta, which is 1 over 4, right? okay, awesome there.
01:12
For questions, see here.
01:14
What are you looking for? we are looking for a cotan pi over 2 minus theta.
01:26
Okay, so remember that pi radiance equals 180 degrees...