1.\" $OpenBSD: carg.3,v 1.2 2013/06/05 03:40:26 tedu Exp $ 2.\" 3.\" Copyright (c) 2011 Martynas Venckus <martynas@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: June 5 2013 $ 18.Dt CARG 3 19.Os 20.Sh NAME 21.Nm carg , 22.Nm cargf , 23.Nm cargl 24.Nd complex argument functions 25.Sh SYNOPSIS 26.In complex.h 27.Ft double 28.Fn carg "double complex z" 29.Ft float 30.Fn cargf "float complex z" 31.Ft long double 32.Fn cargl "long double complex z" 33.Sh DESCRIPTION 34The 35.Fn carg , 36.Fn cargf 37and 38.Fn cargl 39functions compute the argument (also called phase angle) of 40.Fa z , 41with a branch cut on the negative real axis. 42.Sh RETURN VALUES 43The 44.Fn carg , 45.Fn cargf 46and 47.Fn cargl 48functions return the argument in the interval 49.Bq -Pi, Pi . 50.Sh SEE ALSO 51.Xr cimag 3 52.Sh STANDARDS 53The 54.Fn carg , 55.Fn cargf 56and 57.Fn cargl 58functions conform to 59.St -isoC-99 . 60