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Annotation of src/lib/libm/man/atanh.3, Revision 1.16

1.1       cgd         1: .\" Copyright (c) 1985, 1991 Regents of the University of California.
                      2: .\" All rights reserved.
                      3: .\"
                      4: .\" Redistribution and use in source and binary forms, with or without
                      5: .\" modification, are permitted provided that the following conditions
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                      7: .\" 1. Redistributions of source code must retain the above copyright
                      8: .\"    notice, this list of conditions and the following disclaimer.
                      9: .\" 2. Redistributions in binary form must reproduce the above copyright
                     10: .\"    notice, this list of conditions and the following disclaimer in the
                     11: .\"    documentation and/or other materials provided with the distribution.
1.15      agc        12: .\" 3. Neither the name of the University nor the names of its contributors
1.1       cgd        13: .\"    may be used to endorse or promote products derived from this software
                     14: .\"    without specific prior written permission.
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                     16: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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1.2       mycroft    28: .\"     from: @(#)atanh.3      5.2 (Berkeley) 5/6/91
1.16    ! matt       29: .\"    $NetBSD: atanh.3,v 1.15 2003/08/07 16:44:46 agc Exp $
1.1       cgd        30: .\"
1.16    ! matt       31: .Dd January 29, 2013
1.1       cgd        32: .Dt ATANH 3
1.8       christos   33: .Os
1.1       cgd        34: .Sh NAME
1.12      kleink     35: .Nm atanh ,
1.16    ! matt       36: .Nm atanhf ,
        !            37: .Nm atanhl
1.1       cgd        38: .Nd inverse hyperbolic tangent function
1.10      perry      39: .Sh LIBRARY
                     40: .Lb libm
1.1       cgd        41: .Sh SYNOPSIS
1.14      wiz        42: .In math.h
1.1       cgd        43: .Ft double
                     44: .Fn atanh "double x"
1.5       jtc        45: .Ft float
                     46: .Fn atanhf "float x"
1.16    ! matt       47: .Ft long double
        !            48: .Fn atanhl "long double x"
1.1       cgd        49: .Sh DESCRIPTION
                     50: The
1.16    ! matt       51: .Fn atanh ,
        !            52: .Fn atanhf ,
1.5       jtc        53: and
1.16    ! matt       54: .Fn atanhl
1.5       jtc        55: functions compute the inverse hyperbolic tangent
1.1       cgd        56: of the real
                     57: argument
                     58: .Ar x .
                     59: .Sh RETURN VALUES
1.13      ross       60: If |x|\*[Ge]1,
1.16    ! matt       61: .Fn atanh "x" ,
        !            62: .Fn atanhf "x" ,
1.8       christos   63: and
1.16    ! matt       64: .Fn atanhl "x"
1.8       christos   65: .\" POSIX_MODE
                     66: return +inf, -inf or NaN, and sets the global variable
                     67: .Va errno
1.11      kristerw   68: to EDOM.
1.8       christos   69: .\" SYSV_MODE
                     70: .\" call
                     71: .\" .Xr matherr 3 .
1.1       cgd        72: .Sh SEE ALSO
                     73: .Xr acosh 3 ,
                     74: .Xr asinh 3 ,
                     75: .Xr exp 3 ,
1.8       christos   76: .Xr math 3
                     77: .\" .Xr matherr 3
1.1       cgd        78: .Sh HISTORY
                     79: The
                     80: .Fn atanh
                     81: function appeared in
                     82: .Bx 4.3 .
1.16    ! matt       83: .Sh STANDARDS
        !            84: The
        !            85: .Fn atanh
        !            86: function conforms to
        !            87: .St -isoC-99 .

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