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On 04/07/2014 10:43 AM, Dirk Laurie wrote:
But since that is not on the table, the main argument in favour of precisely sinh, cosh, tanh is that they belong to a class of functions called "elementary" by mathematicians, which are commonly taught even to engineering students in English-speaking countries, and that their implementation involves subtle points.
I don't remember hyperbolic trig functions being elementary, only sin and cos and their inverses (not even tg). Tough I didn't study in a english speking country. :)
The only oportunity I've stumbled with sinh/cosh&family was when doing math with complex numbers, and that won't happen in Lua. That doesn't look like a general purpose tool to me.
OTOH, I do avoid modules that have to be built as much as possible.OTOH, sinh & cosh can be defined as oneliner functions of exp just checking wikipedia.
Jorge