Can math.atan2 return INF?
pdorange at pas-de-pub-merci.mac.com
Wed Jun 22 13:18:02 EDT 2016
Ben Bacarisse <ben.usenet at bsb.me.uk> wrote:
> >>> math.atan2(INF, INF)
> I would have expected NaN since atan2(INF, INF) could be thought of as
> the limit of atan2(x, y) which could be any value in the range. And I'd
> have guessed atan2(0, 0) would have been NaN too but
i'm not a math expert, but the limit of atan2 would be 45°, so pi/4
As x,y are coordinates, the both infinite would tend toward 45°.
x only infinite would be 0° (0 radians)
y only infinite woudl be 180° (pi/2 radians)
Pierre-Alain Dorange <http://microwar.sourceforge.net/>
Ce message est sous licence Creative Commons "by-nc-sa-2.0"
More information about the Python-list