tanh.3 (3a8617a83f16ffc9db4f96e1f0f21af94078e6b1) tanh.3 (7a15a32a17f4c2cbeb6f842c4c6b1cf93e4639e7)
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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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: @(#)tanh.3 5.1 (Berkeley) 5/2/91
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.

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

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: @(#)tanh.3 5.1 (Berkeley) 5/2/91
33.\" $Id: tanh.3,v 1.4 1993/10/05 16:33:49 jtc Exp $
33.\" $Id: tanh.3,v 1.1.1.1 1994/08/19 09:39:43 jkh Exp $
34.\"
35.Dd May 2, 1991
36.Dt TANH 3
37.Os
38.Sh NAME
34.\"
35.Dd May 2, 1991
36.Dt TANH 3
37.Os
38.Sh NAME
39.Nm tanh
40.Nd hyperbolic tangent function
39.Nm tanh ,
40.Nm tanhf
41.Nd hyperbolic tangent functions
41.Sh SYNOPSIS
42.Fd #include <math.h>
43.Ft double
44.Fn tanh "double x"
42.Sh SYNOPSIS
43.Fd #include <math.h>
44.Ft double
45.Fn tanh "double x"
46.Ft float
47.Fn tanhf "float x"
45.Sh DESCRIPTION
46The
47.Fn tanh
48.Sh DESCRIPTION
49The
50.Fn tanh
48function computes the hyperbolic tangent of
51and the
52.Fn tanhf
53functions compute the hyperbolic tangent of
49.Fa x .
50For a discussion of error due to roundoff, see
51.Xr math 3 .
52.Sh RETURN VALUES
53The
54.Fn tanh
54.Fa x .
55For a discussion of error due to roundoff, see
56.Xr math 3 .
57.Sh RETURN VALUES
58The
59.Fn tanh
55function returns the hyperbolic tangent value.
60and the
61.Fn tanhf
62functions return the hyperbolic tangent value.
56.Sh SEE ALSO
57.Xr acos 3 ,
58.Xr asin 3 ,
59.Xr atan 3 ,
60.Xr atan2 3 ,
61.Xr cos 3 ,
62.Xr cosh 3 ,
63.Xr sin 3 ,
64.Xr sinh 3 ,
65.Xr tan 3 ,
66.Xr math 3
67.Sh STANDARDS
68The
69.Fn tanh
70function conforms to
71.St -ansiC .
63.Sh SEE ALSO
64.Xr acos 3 ,
65.Xr asin 3 ,
66.Xr atan 3 ,
67.Xr atan2 3 ,
68.Xr cos 3 ,
69.Xr cosh 3 ,
70.Xr sin 3 ,
71.Xr sinh 3 ,
72.Xr tan 3 ,
73.Xr math 3
74.Sh STANDARDS
75The
76.Fn tanh
77function conforms to
78.St -ansiC .