Humm, I'd pay money for a math library that performed all the standard trig functions:
sine
cosine
tangent
arcsine
arccosine
arctangent
hyperbolic sine
hyperbolic cosine
hyperbolic tangent
etc.
logs
natural logs
etc.
Support for imaginary numbers might be nice.
Diferentiation and integration would also be fantastic!
Multi-dimensional vector operations. :-)
I'll keep dreaming...
