2009-09-26, 04:00 PM
sin is to the unit circle as sinh is to the unit hyperbola, basically.
![[Image: 296px-Hyperbolic_functions.svg.png]](http://upload.wikimedia.org/wikipedia/en/thumb/f/f3/Hyperbolic_functions.svg/296px-Hyperbolic_functions.svg.png)
From wiki, which also has the relations he used.
From wiki, which also has the relations he used.

