1.\" $NetBSD: catanh.3,v 1.3 2013/01/29 02:05:09 matt Exp $ 2.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 3.Dd January 29, 2013 4.Dt CATANH 3 5.Os 6.Sh NAME 7.Nm catanh , 8.Nm catanhf , 9.Nm catanhl 10.Nd complex arc hyperbolic tangent functions 11.Sh SYNOPSIS 12.In complex.h 13.Ft double complex 14.Fn catanh "double complex z" 15.Ft float complex 16.Fn catanhf "float complex z" 17.Ft long double complex 18.Fn catanhl "long double complex z" 19.Sh DESCRIPTION 20These functions compute the complex arc hyperbolic tangent of 21.Ar z , 22with branch cuts outside the interval 23[\-1,\ +1] along the real axis. 24.Sh RETURN VALUES 25These functions return the complex arc hyperbolic tangent value, 26in the range of a strip mathematically unbounded along 27the real axis and in the interval [\-i pi/2,\ +i pi/2] along 28the imaginary axis. 29.Sh ERRORS 30No errors are defined. 31.Sh SEE ALSO 32.Xr ctanh 3 , 33.St -p1003.1-2001 34.Aq Pa complex.h 35.Sh COPYRIGHT 36Portions of this text are reprinted and reproduced in electronic form 37from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology 38-- Portable Operating System Interface (POSIX), The Open Group Base 39Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of 40Electrical and Electronics Engineers, Inc and The Open Group. 41In the 42event of any discrepancy between this version and the original IEEE and 43The Open Group Standard, the original IEEE and The Open Group Standard 44is the referee document. 45The original Standard can be obtained online at 46http://www.opengroup.org/unix/online.html . 47