good chemistry is complicated, and a little bit messy LW 

PerlMonks 
Re: Advanced Math?by PERLscienceman (Curate) 
on Jul 26, 2003 at 13:35 UTC ( #278093=note: print w/replies, xml )  Need Help?? 
Greetings afkaos:
If you want to start with : "Geometric Proportions",
geometry/trigonometic related functions can be
accessed by using Math::Trig, this is a
core module and covers things such as tan, cot, sin, cos, ...etc.; it also has a predefined constant pi. Math::Trig is a core module.
You may also want to have a look at Math::Geometry.
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