1.\" $NetBSD: cacos.3,v 1.3 2013/01/29 02:05:08 matt Exp $ 2.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 3.Dd January 29, 2013 4.Dt CACOS 3 5.Os 6.Sh NAME 7.Nm cacos , 8.Nm cacosf , 9.Nm cacosl 10.Nd complex arc cosine functions 11.Sh SYNOPSIS 12.In complex.h 13.Ft double complex 14.Fn cacos "double complex z" 15.Ft float complex 16.Fn cacosf "float complex z" 17.Ft long double complex 18.Fn cacosl "long double complex z" 19.Sh DESCRIPTION 20These functions compute the complex arc cosine of 21.Ar z , 22with branch cuts outside the interval [\-1,\ +1] along the 23real axis. 24.Sh RETURN VALUES 25These functions return the complex arc cosine value, in the 26range of a strip mathematically unbounded along the imaginary 27axis and in the interval [0,\ pi] along the real axis. 28.Sh ERRORS 29No errors are defined. 30.Sh SEE ALSO 31.Xr ccos 3 , 32.St -p1003.1-2001 33.Aq Pa complex.h 34.Sh COPYRIGHT 35Portions of this text are reprinted and reproduced in electronic form 36from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology 37-- Portable Operating System Interface (POSIX), The Open Group Base 38Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of 39Electrical and Electronics Engineers, Inc and The Open Group. 40In the 41event of any discrepancy between this version and the original IEEE and 42The Open Group Standard, the original IEEE and The Open Group Standard 43is the referee document. 44The original Standard can be obtained online at 45http://www.opengroup.org/unix/online.html . 46