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[linuxjm/LDP_man-pages.git] / original / man3 / tanh.3

diff --git a/original/man3/tanh.3 b/original/man3/tanh.3
index 859c09e..410e082 100644 (file)
--- a/original/man3/tanh.3
+++ b/original/man3/tanh.3
@@ -2,6 +2,7 @@
 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
 .\"     <mtk.manpages@gmail.com>
 .\"
+.\" %%%LICENSE_START(VERBATIM)
 .\" 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.
@@ -21,6 +22,7 @@
 .\"
 .\" Formatted or processed versions of this manual, if unaccompanied by
 .\" the source, must acknowledge the copyright and authors of this work.
+.\" %%%LICENSE_END
 .\"
 .\" References consulted:
 .\"     Linux libc source code
@@ -30,7 +32,7 @@
 .\" Modified 2002-07-27 by Walter Harms
 .\"    (walter.harms@informatik.uni-oldenburg.de)
 .\"
-.TH TANH 3 2008-08-05 ""  "Linux Programmer's Manual"
+.TH TANH 3 2014-01-07 ""  "Linux Programmer's Manual"
 .SH NAME
 tanh, tanhf, tanhl \- hyperbolic tangent function
 .SH SYNOPSIS
@@ -54,19 +56,26 @@ Feature Test Macro Requirements for glibc (see
 .ad l
 .BR tanhf (),
 .BR tanhl ():
-_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
+.RS 4
+_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
+_POSIX_C_SOURCE\ >=\ 200112L;
+.br
+or
 .I cc\ -std=c99
-.ad b
+.RE
+.ad
 .SH DESCRIPTION
 The
 .BR tanh ()
-function returns the hyperbolic tangent of \fIx\fP, which
+function returns the hyperbolic tangent of
+.IR x ,
+which
 is defined mathematically as:
 .nf
 
     tanh(x) = sinh(x) / cosh(x)
 .fi
-.SH "RETURN VALUE"
+.SH RETURN VALUE
 On success, these functions return the hyperbolic tangent of
 .IR x .
 
@@ -88,16 +97,33 @@ is positive infinity (negative infinity),
 .\" glibc 2.8 does not do this.
 .SH ERRORS
 No errors occur.
-.SH "CONFORMING TO"
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR tanh (),
+.BR tanhf (),
+and
+.BR tanhl ()
+functions are thread-safe.
+.SH CONFORMING TO
 C99, POSIX.1-2001.
 The variant returning
 .I double
 also conforms to
 SVr4, 4.3BSD, C89.
-.SH "SEE ALSO"
+.SH SEE ALSO
 .BR acosh (3),
 .BR asinh (3),
 .BR atanh (3),
 .BR cosh (3),
 .BR ctanh (3),
 .BR sinh (3)
+.SH COLOPHON
+This page is part of release 3.79 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.