That's the problem. Everybody has to guess. Everyone thinks there is something out there that somebody else knows. This is a problem I dont have in some of the other ecosystems.
That I would have to (i) write my own cos or (ii) take a dependency on a commercial 3rd party library that will likely not be around for long or (iii) call a native library through and FFI, for something as simple as a cos of float32 is not terribly exciting.
I have to guess because that kind of work was only relevant to me 5 years ago, so I lost track of what everyone doing data analysis with .NET is using nowadays.
Oh I have been guessing all year long for several years although it is very relevant to what I do.
BTW I did not intend to mean that you are being unhelpful. Scientific computation just isnt a first class citizen of the .net ecosystem. Either you have to write your own or take a dependency on a commercial library for even the simplest stuff and pray that they will be around.
That I would have to (i) write my own cos or (ii) take a dependency on a commercial 3rd party library that will likely not be around for long or (iii) call a native library through and FFI, for something as simple as a cos of float32 is not terribly exciting.