On Sun, Oct 25, 2015 at 10:16:41AM +0100, Emre Hasegeli wrote:
> > Currently PostgreSQL only has trigonometric functions that work in
> > radians. I think it would be quite useful to have an equivalent set of
> > functions that worked in degrees. In other environments these are
> > commonly spelled sind(), cosd(), etc.
>
> I would prefer gradian over degree.
We can have both, but degree is a good bit better known, which means
more users will care about it.
People have gone a long way toward dealing with problems like the
known correspondence (90° = π/2, etc.) and periodicity (f(x) =
f(x+360*n) for integer n, f in (sin, cos, tan, cot, sec, csc), for
example).
I haven't yet found same in a PostgreSQL-compatible library, though.
Cheers,
David.
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