| acos.3 (3a8617a83f16ffc9db4f96e1f0f21af94078e6b1) | acos.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. --- 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: @(#)acos.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: @(#)acos.3 5.1 (Berkeley) 5/2/91 |
| 33.\" $Id: acos.3,v 1.4 1993/10/29 22:57:17 jtc Exp $ | 33.\" $Id: acos.3,v 1.1.1.1 1994/08/19 09:39:41 jkh Exp $ |
| 34.\" 35.Dd May 2, 1991 36.Dt ACOS 3 37.Os 38.Sh NAME | 34.\" 35.Dd May 2, 1991 36.Dt ACOS 3 37.Os 38.Sh NAME |
| 39.Nm acos 40.Nd arc cosine function | 39.Nm acos , 40.Nm acosf 41.Nd arc cosine functions |
| 41.Sh SYNOPSIS 42.Fd #include <math.h> 43.Ft double 44.Fn acos "double x" | 42.Sh SYNOPSIS 43.Fd #include <math.h> 44.Ft double 45.Fn acos "double x" |
| 46.Ft float 47.Fn acosf "float x" |
|
| 45.Sh DESCRIPTION 46The 47.Fn acos | 48.Sh DESCRIPTION 49The 50.Fn acos |
| 48function computes the principal value of the arc cosine of | 51and the 52.Fn acosf 53functions compute the principal value of the arc cosine of |
| 49.Fa x . 50A domain error occurs for arguments not in the range [-1, +1]. 51For a discussion of error due to roundoff, see 52.Xr math 3 . 53.Sh RETURN VALUES 54The 55.Fn acos | 54.Fa x . 55A domain error occurs for arguments not in the range [-1, +1]. 56For a discussion of error due to roundoff, see 57.Xr math 3 . 58.Sh RETURN VALUES 59The 60.Fn acos |
| 56function returns the arc cosine in the range | 61and the 62.Fn acosf 63functions return the arc cosine in the range |
| 57.Bq 0 , \*(Pi 58radians. 59On the 60.Tn VAX 61and 62.Tn Tahoe , 63if: 64.Bd -unfilled -offset indent --- 25 unchanged lines hidden --- | 64.Bq 0 , \*(Pi 65radians. 66On the 67.Tn VAX 68and 69.Tn Tahoe , 70if: 71.Bd -unfilled -offset indent --- 25 unchanged lines hidden --- |