diff options
Diffstat (limited to 'man3/acosh.3')
| -rw-r--r-- | man3/acosh.3 | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/man3/acosh.3 b/man3/acosh.3 new file mode 100644 index 000000000..723b01e07 --- /dev/null +++ b/man3/acosh.3 @@ -0,0 +1,63 @@ +.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) +.\" +.\" Permission is granted to make and distribute verbatim copies of this +.\" manual provided the copyright notice and this permission notice are +.\" preserved on all copies. +.\" +.\" Permission is granted to copy and distribute modified versions of this +.\" manual under the conditions for verbatim copying, provided that the +.\" entire resulting derived work is distributed under the terms of a +.\" permission notice identical to this one. +.\" +.\" Since the Linux kernel and libraries are constantly changing, this +.\" manual page may be incorrect or out-of-date. The author(s) assume no +.\" responsibility for errors or omissions, or for damages resulting from +.\" the use of the information contained herein. The author(s) may not +.\" have taken the same level of care in the production of this manual, +.\" which is licensed free of charge, as they might when working +.\" professionally. +.\" +.\" Formatted or processed versions of this manual, if unaccompanied by +.\" the source, must acknowledge the copyright and authors of this work. +.\" +.\" References consulted: +.\" Linux libc source code +.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) +.\" 386BSD man pages +.\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu) +.\" Modified 2002-07-25 by Walter Harms +.\" (walter.harms@informatik.uni-oldenburg.de) +.\" +.TH ACOSH 3 2002-07-25 "" "Linux Programmer's Manual" +.SH NAME +acosh, acoshf, acoshl \- inverse hyperbolic cosine function +.SH SYNOPSIS +.nf +.B #include <math.h> +.sp +.BI "double acosh(double " x ); +.br +.BI "float acoshf(float " x ); +.br +.BI "long double acoshl(long double " x ); +.sp +.fi +Link with \-lm. +.SH DESCRIPTION +The \fBacosh()\fP function calculates the inverse hyperbolic cosine of +\fIx\fP; that is the value whose hyperbolic cosine is \fIx\fP. If \fIx\fP +is less than 1.0, \fBacosh()\fP returns not-a-number (NaN) and \fIerrno\fP +is set. +.SH ERRORS +.TP +.B EDOM +\fIx\fP is out of range. +.SH "CONFORMING TO" +SVID 3, POSIX, BSD 4.3, ISO 9899. +The float and long double variants are C99 requirements. +.SH "SEE ALSO" +.BR asinh (3), +.BR atanh (3), +.BR cosh (3), +.BR sinh (3), +.BR tanh (3) |