| The Android Open Source Project | a27d2ba | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | .\" Copyright (c) 1991 The Regents of the University of California. |
| 2 | .\" All rights reserved. |
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| 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. |
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| 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 |
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| 32 | .\" from: @(#)asin.3 5.1 (Berkeley) 5/2/91 |
| 33 | .\" $FreeBSD: src/lib/msun/man/asin.3,v 1.15 2005/01/14 23:28:28 das Exp $ |
| 34 | .\" |
| 35 | .Dd January 14, 2005 |
| 36 | .Dt ASIN 3 |
| 37 | .Os |
| 38 | .Sh NAME |
| 39 | .Nm asin , |
| 40 | .Nm asinf |
| 41 | .Nd arc sine functions |
| 42 | .Sh LIBRARY |
| 43 | .Lb libm |
| 44 | .Sh SYNOPSIS |
| 45 | .In math.h |
| 46 | .Ft double |
| 47 | .Fn asin "double x" |
| 48 | .Ft float |
| 49 | .Fn asinf "float x" |
| 50 | .Sh DESCRIPTION |
| 51 | The |
| 52 | .Fn asin |
| 53 | and the |
| 54 | .Fn asinf |
| 55 | functions compute the principal value of the arc sine of |
| 56 | .Fa x . |
| 57 | A domain error occurs for arguments not in the range |
| 58 | .Bq -1 , +1 . |
| 59 | For a discussion of error due to roundoff, see |
| 60 | .Xr math 3 . |
| 61 | .Sh RETURN VALUES |
| 62 | The |
| 63 | .Fn asin |
| 64 | and the |
| 65 | .Fn asinf |
| 66 | functions return the arc sine in the range |
| 67 | .Bk -words |
| 68 | .Bq -\*(Pi/2 , +\*(Pi/2 |
| 69 | .Ek |
| 70 | radians. |
| 71 | If: |
| 72 | .Bd -unfilled -offset indent |
| 73 | .Pf \&| Ns Ar x Ns \&| > 1 |
| 74 | .Ed |
| 75 | .Pp |
| 76 | .Fn asin x |
| 77 | raises an invalid exception and returns an \*(Na. |
| 78 | .Sh SEE ALSO |
| 79 | .Xr acos 3 , |
| 80 | .Xr atan 3 , |
| 81 | .Xr atan2 3 , |
| 82 | .Xr cos 3 , |
| 83 | .Xr cosh 3 , |
| 84 | .Xr fenv 3 , |
| 85 | .Xr math 3 , |
| 86 | .Xr sin 3 , |
| 87 | .Xr sinh 3 , |
| 88 | .Xr tan 3 , |
| 89 | .Xr tanh 3 |
| 90 | .Sh STANDARDS |
| 91 | The |
| 92 | .Fn asin |
| 93 | function conforms to |
| 94 | .St -isoC . |