[Audacity-nyquist] Looking for definitions of math functions & waveforms

[David R. S. <dav...@sh...>]

Hi,

i've been unsuccessfully googling for definitions of math functions, 
especially if they are defined in Nyquist or XLISP. For example, tangent 
of an angle  is defined as sine of the  angle divided by the cosine of that
same angle.

I'd also like to find out what the mathematical definitions are for 
waveforms other than sinusoidal, such as cycloid or a perfect half circle 
above the zero line (these are two different waveforms).

What net resource(s) are there with such information?

thanks

David