man3/t-v.3: srcfix: Use a single-font-style macro for a single argument

[thirdparty/man-pages.git] / man3 / tan.3

diff --git a/man3/tan.3 b/man3/tan.3
index 7da6f9b865109d68c41f980386c4fb7abc1df80d..6a0c3d966ef1d10683b137e00e6ede231d9ed39f 100644 (file)
--- a/man3/tan.3
+++ b/man3/tan.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
@@ -30,54 +32,57 @@
 .\" Modified 2002-07-27 by Walter Harms
 .\"    (walter.harms@informatik.uni-oldenburg.de)
 .\"
-.TH TAN 3 2008-07-29 ""  "Linux Programmer's Manual"
+.TH TAN 3 2017-09-15 ""  "Linux Programmer's Manual"
 .SH NAME
 tan, tanf, tanl \- tangent function
 .SH SYNOPSIS
 .nf
 .B #include <math.h>
-.sp
+.PP
 .BI "double tan(double " x );
-.br
 .BI "float tanf(float " x );
-.br
 .BI "long double tanl(long double " x );
 .fi
-.sp
+.PP
 Link with \fI\-lm\fP.
-.sp
+.PP
 .in -4n
 Feature Test Macro Requirements for glibc (see
 .BR feature_test_macros (7)):
 .in
-.sp
+.PP
 .ad l
 .BR tanf (),
 .BR tanl ():
-_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
-.I cc\ -std=c99
-.ad b
+.RS 4
+_ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L
+    || /* Since glibc 2.19: */ _DEFAULT_SOURCE
+    || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
+.RE
+.ad
 .SH DESCRIPTION
-The
-.BR tan ()
-function returns the tangent of \fIx\fP, where \fIx\fP is
+These functions return the tangent of
+.IR x ,
+where
+.I x
+is
 given in radians.
 .SH RETURN VALUE
 On success, these functions return the tangent of
 .IR x .
-
+.PP
 If
 .I x
 is a NaN, a NaN is returned.
-
+.PP
 If
 .I x
 is positive infinity or negative infinity,
-a "domain error" occurs,
+a domain error occurs,
 and a NaN is returned.
-
+.PP
 If the correct result would overflow,
-a "range error" occurs,
+a range error occurs,
 and the functions return
 .BR HUGE_VAL ,
 .BR HUGE_VALF ,
@@ -102,9 +107,10 @@ when calling these functions.
 The following errors can occur:
 .TP
 Domain error: \fIx\fP is an infinity
-.\" .I errno
-.\" is set to
-.\" .BR EDOM .
+.I errno
+is set to
+.B EDOM
+(but see BUGS).
 An invalid floating-point exception
 .RB ( FE_INVALID )
 is raised.
@@ -118,19 +124,35 @@ Range error: result overflow
 An overflow floating-point exception
 .RB ( FE_OVERFLOW )
 is raised.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbw21 lb lb
+l l l.
+Interface      Attribute       Value
+T{
+.BR tan (),
+.BR tanf (),
+.BR tanl ()
+T}     Thread safety   MT-Safe
+.TE
+.SH CONFORMING TO
+C99, POSIX.1-2001, POSIX.1-2008.
 .PP
-These functions do not set
-.IR errno .
-.\" FIXME . Is it intentional that these functions do not set
-.\" errno (at least for domain error)?
-.\" Bug raised: http://sourceware.org/bugzilla/show_bug.cgi?id=6782
-.SH "CONFORMING TO"
-C99, POSIX.1-2001.
 The variant returning
 .I double
 also conforms to
 SVr4, 4.3BSD, C89.
-.SH "SEE ALSO"
+.SH BUGS
+Before version 2.10, the glibc implementation did not set
+.\" http://sourceware.org/bugzilla/show_bug.cgi?id=6782
+.I errno
+to
+.B EDOM
+when a domain error occurred.
+.SH SEE ALSO
 .BR acos (3),
 .BR asin (3),
 .BR atan (3),