| acos.3 (165906) | acos.3 (181074) |
|---|---|
| 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. --- 12 unchanged lines hidden (view full) --- 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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: @(#)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. --- 12 unchanged lines hidden (view full) --- 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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: @(#)acos.3 5.1 (Berkeley) 5/2/91 |
| 29.\" $FreeBSD: head/lib/msun/man/acos.3 165906 2007-01-09 01:02:06Z imp $ | 29.\" $FreeBSD: head/lib/msun/man/acos.3 181074 2008-07-31 22:41:26Z das $ |
| 30.\" | 30.\" |
| 31.Dd January 14, 2005 | 31.Dd July 31, 2008 |
| 32.Dt ACOS 3 33.Os 34.Sh NAME 35.Nm acos , | 32.Dt ACOS 3 33.Os 34.Sh NAME 35.Nm acos , |
| 36.Nm acosf | 36.Nm acosf , 37.Nm acosl |
| 37.Nd arc cosine functions 38.Sh LIBRARY 39.Lb libm 40.Sh SYNOPSIS 41.In math.h 42.Ft double 43.Fn acos "double x" 44.Ft float 45.Fn acosf "float x" | 38.Nd arc cosine functions 39.Sh LIBRARY 40.Lb libm 41.Sh SYNOPSIS 42.In math.h 43.Ft double 44.Fn acos "double x" 45.Ft float 46.Fn acosf "float x" |
| 47.Ft long double 48.Fn acosl "long double x" |
|
| 46.Sh DESCRIPTION 47The | 49.Sh DESCRIPTION 50The |
| 48.Fn acos 49and the 50.Fn acosf | 51.Fn acos , 52.Fn acosf , 53and 54.Fn acosl |
| 51functions compute the principal value of the arc cosine of 52.Fa x . | 55functions compute the principal value of the arc cosine of 56.Fa x . |
| 53A domain error occurs for arguments not in the range 54.Bq -1 , +1 . 55For a discussion of error due to roundoff, see 56.Xr math 3 . | |
| 57.Sh RETURN VALUES | 57.Sh RETURN VALUES |
| 58The 59.Fn acos 60and the 61.Fn acosf 62functions return the arc cosine in the range | 58These functions return the arc cosine in the range |
| 63.Bq 0 , \*(Pi 64radians. 65If: 66.Bd -unfilled -offset indent 67.Pf \&| Ns Ar x Ns \&| > 1 , 68.Ed 69.Pp 70.Fn acos x --- 7 unchanged lines hidden (view full) --- 78.Xr fenv 3 , 79.Xr math 3 , 80.Xr sin 3 , 81.Xr sinh 3 , 82.Xr tan 3 , 83.Xr tanh 3 84.Sh STANDARDS 85The | 59.Bq 0 , \*(Pi 60radians. 61If: 62.Bd -unfilled -offset indent 63.Pf \&| Ns Ar x Ns \&| > 1 , 64.Ed 65.Pp 66.Fn acos x --- 7 unchanged lines hidden (view full) --- 74.Xr fenv 3 , 75.Xr math 3 , 76.Xr sin 3 , 77.Xr sinh 3 , 78.Xr tan 3 , 79.Xr tanh 3 80.Sh STANDARDS 81The |
| 86.Fn acos 87function conforms to 88.St -isoC . | 82.Fn acos , 83.Fn acosf , 84and 85.Fn acosl 86functions conform to 87.St -isoC-99 . |