1.\" Copyright (c) 1991 The Regents of the University of California.
2.\" All rights reserved.
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.\" 3. All advertising materials mentioning features or use of this software
13.\" must display the following acknowledgement:
14.\" This product includes software developed by the University of
15.\" California, Berkeley and its contributors.
16.\" 4. Neither the name of the University nor the names of its contributors
17.\" may be used to endorse or promote products derived from this software
18.\" without specific prior written permission.
19.\"
20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" from: @(#)cos.3 5.1 (Berkeley) 5/2/91
33.\" $Id: cos.3,v 1.5 1993/10/29 22:57:25 jtc Exp $
34.\"
35.Dd May 2, 1991
36.Dt COS 3
37.Os
38.Sh NAME
39.Nm cos
40.Nd cosine function
41.Sh SYNOPSIS
42.Fd #include <math.h>
43.Ft double
44.Fn cos "double x"
45.Sh DESCRIPTION
46The
47.Fn cos
48function computes the cosine of
49.Fa x
50(measured in radians).
51A large magnitude argument may yield a result with little or no
52significance.
53For a discussion of error due to roundoff, see
54.Xr math 3 .
55.Sh RETURN VALUES
56The
57.Fn cos
58function returns the cosine value.
59.Sh SEE ALSO
60.Xr sin 3 ,
61.Xr tan 3 ,
62.Xr asin 3 ,
63.Xr acos 3 ,
64.Xr atan 3 ,
65.Xr atan2 3 ,
66.Xr sinh 3 ,
67.Xr cosh 3 ,
68.Xr tanh 3 ,
69.Xr math 3
70.Sh STANDARDS
71The
72.Fn cos
73function conforms to
74.St -ansiC .
2.\" All rights reserved.
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.\" 3. All advertising materials mentioning features or use of this software
13.\" must display the following acknowledgement:
14.\" This product includes software developed by the University of
15.\" California, Berkeley and its contributors.
16.\" 4. Neither the name of the University nor the names of its contributors
17.\" may be used to endorse or promote products derived from this software
18.\" without specific prior written permission.
19.\"
20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" from: @(#)cos.3 5.1 (Berkeley) 5/2/91
33.\" $Id: cos.3,v 1.5 1993/10/29 22:57:25 jtc Exp $
34.\"
35.Dd May 2, 1991
36.Dt COS 3
37.Os
38.Sh NAME
39.Nm cos
40.Nd cosine function
41.Sh SYNOPSIS
42.Fd #include <math.h>
43.Ft double
44.Fn cos "double x"
45.Sh DESCRIPTION
46The
47.Fn cos
48function computes the cosine of
49.Fa x
50(measured in radians).
51A large magnitude argument may yield a result with little or no
52significance.
53For a discussion of error due to roundoff, see
54.Xr math 3 .
55.Sh RETURN VALUES
56The
57.Fn cos
58function returns the cosine value.
59.Sh SEE ALSO
60.Xr sin 3 ,
61.Xr tan 3 ,
62.Xr asin 3 ,
63.Xr acos 3 ,
64.Xr atan 3 ,
65.Xr atan2 3 ,
66.Xr sinh 3 ,
67.Xr cosh 3 ,
68.Xr tanh 3 ,
69.Xr math 3
70.Sh STANDARDS
71The
72.Fn cos
73function conforms to
74.St -ansiC .