Quote Originally Posted by ImSavy View Post
What you may not realise ong is that he's using radians not degrees.
Yeah I had to look up radians, I don't remember learning about that at school either. It's clear now how pi is intricately related to the angle of a sector.

And yeah reciprocal is incorrect, I think I can see from mojo's equation solving what the arcsine is relative to the sine. It's what multiplied is to divide.