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+'\" t
+.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
+.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
+.\"     <mtk.manpages@gmail.com>
+.\"
+.\" SPDX-License-Identifier: GPL-1.0-or-later
+.\"
+.TH sincos 3 2023-07-20 "Linux man-pages 6.05.01"
+.SH NAME
+sincos, sincosf, sincosl \- calculate sin and cos simultaneously
+.SH LIBRARY
+Math library
+.RI ( libm ", " \-lm )
+.SH SYNOPSIS
+.nf
+.BR "#define _GNU_SOURCE" "         /* See feature_test_macros(7) */"
+.B #include <math.h>
+.PP
+.BI "void sincos(double " x ", double *" sin ", double *" cos );
+.BI "void sincosf(float " x ", float *" sin ", float *" cos );
+.BI "void sincosl(long double " x ", long double *" sin ", long double *" cos );
+.fi
+.SH DESCRIPTION
+Several applications need sine and cosine of the same angle
+.IR x .
+These functions compute both at the same time, and store the results in
+.I *sin
+and
+.IR *cos .
+Using this function can be more efficient than two separate calls to
+.BR sin (3)
+and
+.BR cos (3).
+.PP
+If
+.I x
+is a NaN,
+a NaN is returned in
+.I *sin
+and
+.IR *cos .
+.PP
+If
+.I x
+is positive infinity or negative infinity,
+a domain error occurs, and
+a NaN is returned in
+.I *sin
+and
+.IR *cos .
+.SH RETURN VALUE
+These functions return
+.IR void .
+.SH ERRORS
+See
+.BR math_error (7)
+for information on how to determine whether an error has occurred
+when calling these functions.
+.PP
+The following errors can occur:
+.TP
+Domain error: \fIx\fP is an infinity
+.I errno
+is set to
+.B EDOM
+(but see BUGS).
+An invalid floating-point exception
+.RB ( FE_INVALID )
+is raised.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR sincos (),
+.BR sincosf (),
+.BR sincosl ()
+T}	Thread safety	MT-Safe
+.TE
+.sp 1
+.SH STANDARDS
+GNU.
+.SH HISTORY
+glibc 2.1.
+.SH NOTES
+To see the performance advantage of
+.BR sincos (),
+it may be necessary to disable
+.BR gcc (1)
+built-in optimizations, using flags such as:
+.PP
+.in +4n
+.EX
+cc \-O \-lm \-fno\-builtin prog.c
+.EE
+.in
+.SH BUGS
+Before glibc 2.22, the glibc implementation did not set
+.\" https://www.sourceware.org/bugzilla/show_bug.cgi?id=15467
+.I errno
+to
+.B EDOM
+when a domain error occurred.
+.SH SEE ALSO
+.BR cos (3),
+.BR sin (3),
+.BR tan (3)