tan.3 (ee7093a6400feef3d8a99579f28577817d70f6ad) tan.3 (f869a8c5f3dbca90e9b4ed07e45ca8f52080461e)
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.

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23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" from: @(#)tan.3 5.1 (Berkeley) 5/2/91
29.\" $FreeBSD$
30.\"
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.

--- 14 unchanged lines hidden (view full) ---

23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" from: @(#)tan.3 5.1 (Berkeley) 5/2/91
29.\" $FreeBSD$
30.\"
31.Dd May 2, 1991
31.Dd January 24, 2008
32.Dt TAN 3
33.Os
34.Sh NAME
35.Nm tan ,
32.Dt TAN 3
33.Os
34.Sh NAME
35.Nm tan ,
36.Nm tanf
36.Nm tanf ,
37.Nm tanl
37.Nd tangent functions
38.Sh LIBRARY
39.Lb libm
40.Sh SYNOPSIS
41.In math.h
42.Ft double
43.Fn tan "double x"
44.Ft float
45.Fn tanf "float x"
38.Nd tangent functions
39.Sh LIBRARY
40.Lb libm
41.Sh SYNOPSIS
42.In math.h
43.Ft double
44.Fn tan "double x"
45.Ft float
46.Fn tanf "float x"
47.Ft long double
48.Fn tanl "long double x"
46.Sh DESCRIPTION
47The
49.Sh DESCRIPTION
50The
48.Fn tan
49and the
50.Fn tanf
51.Fn tan ,
52.Fn tanf ,
53and
54.Fn tanl
51functions compute the tangent of
52.Fa x
53(measured in radians).
54A large magnitude argument may yield a result
55with little or no significance.
56For a discussion of error due to roundoff, see
57.Xr math 3 .
58.Sh RETURN VALUES
59The
55functions compute the tangent of
56.Fa x
57(measured in radians).
58A large magnitude argument may yield a result
59with little or no significance.
60For a discussion of error due to roundoff, see
61.Xr math 3 .
62.Sh RETURN VALUES
63The
60.Fn tan
61function returns the tangent value.
64.Fn tan ,
65.Fn tanf ,
66and
67.Fn tanl
68functions return the tangent value.
62.Sh SEE ALSO
63.Xr acos 3 ,
64.Xr asin 3 ,
65.Xr atan 3 ,
66.Xr atan2 3 ,
67.Xr cos 3 ,
68.Xr cosh 3 ,
69.Xr math 3 ,
70.Xr sin 3 ,
71.Xr sinh 3 ,
72.Xr tanh 3
73.Sh STANDARDS
69.Sh SEE ALSO
70.Xr acos 3 ,
71.Xr asin 3 ,
72.Xr atan 3 ,
73.Xr atan2 3 ,
74.Xr cos 3 ,
75.Xr cosh 3 ,
76.Xr math 3 ,
77.Xr sin 3 ,
78.Xr sinh 3 ,
79.Xr tanh 3
80.Sh STANDARDS
74The
75.Fn tan
76function conforms to
77.St -isoC .
81These functions conform to
82.St -isoC-99 .