1.\" $OpenBSD: sincos.3,v 1.1 2018/03/10 20:52:58 kettenis Exp $ 2.\" Copyright (c) 2011 Steven G. Kargl. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD: head/lib/msun/man/sincos.3 319047 2017-05-28 06:13:38Z mmel $ 26.\" 27.Dd $Mdocdate: March 10 2018 $ 28.Dt SINCOS 3 29.Os 30.Sh NAME 31.Nm sincos , 32.Nm sincosf , 33.Nm sincosl 34.Nd sine and cosine functions 35.Sh SYNOPSIS 36.In math.h 37.Ft void 38.Fn sincos "double x" "double *s" "double *c" 39.Ft void 40.Fn sincosf "float x" "float *s" "float *c" 41.Ft void 42.Fn sincosl "long double x" "long double *s" "long double *c" 43.Sh DESCRIPTION 44The 45.Fn sincos , 46.Fn sincosf , 47and 48.Fn sincosl 49functions compute the sine and cosine of 50.Fa x . 51Using these functions allows argument reduction to occur only 52once instead of twice with individual invocations of 53.Fn sin 54and 55.Fn cos . 56Like 57.Fn sin 58and 59.Fn cos , 60a large magnitude argument may yield a result with little 61or no significance. 62.Sh RETURN VALUES 63Upon returning from 64.Fn sincos , 65.Fn sincosf , 66and 67.Fn sincosl , 68the objects pointed to by 69.Ar "*s" 70and 71.Ar "*c" 72are assigned the values of sine and cosine, respectively. 73.Sh SEE ALSO 74.Xr cos 3 , 75.Xr sin 3 76.Sh HISTORY 77These functions first appeared in 78.Ox 6.3 . 79