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atan2 - Perldoc Browser
- #atan2 Y,X
-
Returns the arctangent of Y/X in the range -PI to PI.
For the tangent operation, you may use the
Math::Trig::tanfunction, or use the familiar relation:sub tan { sin($_[0]) / cos($_[0]) }The return value for
atan2(0,0)is implementation-defined; consult your atan2(3) manpage for more information.Portability issues: "atan2" in perlport.
Perldoc Browser is maintained by Dan Book (DBOOK). Please contact him via the GitHub issue tracker or email regarding any issues with the site itself, search, or rendering of documentation.
The Perl documentation is maintained by the Perl 5 Porters in the development of Perl. Please contact them via the Perl issue tracker, the mailing list, or IRC to report any issues with the contents or format of the documentation.