>
>It is usually a fairly simple matter to get from a trig or exponantial
>function of one sort or another to its underlying series form.
>
>But how can you get from a known accurate series expression to a
>nonobvious and crucially esoteric equivalent function?
>
>Specifically, the "raw" power series
>
If the power series stops at 20 terms, the sin() and cos() family are very unlikely to be an exact fit.
There for a minute I thought I had something but it didn't pan out.