diff options
Diffstat (limited to 'libm/man/acosh.3')
-rw-r--r-- | libm/man/acosh.3 | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libm/man/acosh.3 b/libm/man/acosh.3 new file mode 100644 index 0000000..62534ab --- /dev/null +++ b/libm/man/acosh.3 @@ -0,0 +1,82 @@ +.\" Copyright (c) 1991 Regents of the University of California. +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" from: @(#)acosh.3 5.2 (Berkeley) 5/6/91 +.\" $FreeBSD: src/lib/msun/man/acosh.3,v 1.11 2005/01/14 23:28:28 das Exp $ +.\" +.Dd January 14, 2005 +.Dt ACOSH 3 +.Os +.Sh NAME +.Nm acosh , +.Nm acoshf +.Nd inverse hyperbolic cosine functions +.Sh LIBRARY +.Lb libm +.Sh SYNOPSIS +.In math.h +.Ft double +.Fn acosh "double x" +.Ft float +.Fn acoshf "float x" +.Sh DESCRIPTION +The +.Fn acosh +and the +.Fn acoshf +functions compute the inverse hyperbolic cosine +of the real +argument +.Ar x . +For a discussion of error due to roundoff, see +.Xr math 3 . +.Sh RETURN VALUES +The +.Fn acosh +and the +.Fn acoshf +functions +return the inverse hyperbolic cosine of +.Ar x . +If the argument is less than 1, +.Fn acosh +raises an invalid exception and returns an \*(Na. +.Sh SEE ALSO +.Xr asinh 3 , +.Xr atanh 3 , +.Xr exp 3 , +.Xr fenv 3 , +.Xr math 3 +.Sh HISTORY +The +.Fn acosh +function appeared in +.Bx 4.3 . |