forked from amazingfate/help
101 lines
7.0 KiB
XML
Executable File
101 lines
7.0 KiB
XML
Executable File
<?xml version="1.0" encoding="UTF-8"?>
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<!--***********************************************************************
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRUNTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRUNTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc..
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************--><helpdocument version="1.0">
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<meta>
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<topic id="textsbasicshared03080101xml" indexer="include" status="PUBLISH">
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<title xml-lang="en-US" id="tit">Atn Function [Runtime]</title>
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<filename>/text/sbasic/shared/03080101.xhp</filename>
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</topic>
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<history>
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<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created>
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<lastedited date="2003-10-31T00:00:00">converted from old format - fpe</lastedited>
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</history>
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</meta>
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<body>
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<section id="atn">
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<bookmark xml-lang="en-US" branch="index" id="bm_id3150616"><bookmark_value>Atn;function</bookmark_value></bookmark><paragraph id="hd_id3150616" role="heading" level="1" oldref="1" l10n="U" xml-lang="en-US"><link href="text/sbasic/shared/03080101.xhp" name="Atn Function [Runtime]">Atn Function [Runtime]</link></paragraph>
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<paragraph role="paragraph" id="par_id3149346" l10n="U" xml-lang="en-US" oldref="2">Trigonometric function that returns the arctangent of a numeric expression. The return value is in the range -Pi/2 to +Pi/2.</paragraph>
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</section>
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<paragraph role="paragraph" id="par_id3143271" l10n="U" xml-lang="en-US" oldref="3">The arctangent is the inverse of the tangent function. The Atn Function returns the angle "Alpha", expressed in radians, using the tangent of this angle. The function can also return the angle "Alpha" by comparing the ratio of the length of the side that is opposite of the angle to the length of the side that is adjacent to the angle in a right-angled triangle.</paragraph>
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<paragraph role="paragraph" id="par_id3145315" l10n="U" xml-lang="en-US" oldref="4">Atn(side opposite the angle/side adjacent to angle)= Alpha</paragraph>
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<paragraph role="heading" level="2" id="hd_id3149669" l10n="U" xml-lang="en-US" oldref="5">Syntax:</paragraph>
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<paragraph role="paragraph" id="par_id3148947" l10n="U" xml-lang="en-US" oldref="6">Atn (Number)</paragraph>
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<paragraph role="heading" level="2" id="hd_id3148664" l10n="U" xml-lang="en-US" oldref="7">Return value:</paragraph>
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<paragraph role="paragraph" id="par_id3150359" l10n="U" xml-lang="en-US" oldref="8">Double</paragraph>
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<paragraph role="heading" level="2" id="hd_id3148798" l10n="U" xml-lang="en-US" oldref="9">Parameters:</paragraph>
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<paragraph l10n="U" role="paragraph" id="par_id3156212" xml-lang="en-US" oldref="10"><emph>Number:</emph> Any numerical expression that represents the ratio of two sides of a right triangle. The Atn function returns the corresponding angle in radians (arctangent).</paragraph>
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<paragraph role="paragraph" id="par_id3153192" l10n="U" xml-lang="en-US" oldref="11">To convert radians to degrees, multiply radians by 180/pi.</paragraph>
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<paragraph role="paragraph" id="par_id3147230" l10n="U" xml-lang="en-US" oldref="12">degree=(radian*180)/pi</paragraph>
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<paragraph role="paragraph" id="par_id3125864" l10n="U" xml-lang="en-US" oldref="13">radian=(degree*pi)/180</paragraph>
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<paragraph role="paragraph" id="par_id3159252" l10n="U" xml-lang="en-US" oldref="14">Pi is here the fixed circle constant with the rounded value 3.14159.</paragraph>
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<embed href="text/sbasic/shared/00000003.xhp#errorcode"/>
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<embed href="text/sbasic/shared/00000003.xhp#err5"/>
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<paragraph role="heading" level="2" id="hd_id3153142" l10n="U" xml-lang="en-US" oldref="15">Example:</paragraph>
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<paragraph role="paragraph" id="par_id3146985" l10n="U" xml-lang="en-US" oldref="16">REM The following example calculates for a right-angled triangle</paragraph>
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<paragraph role="paragraph" id="par_id3145750" l10n="U" xml-lang="en-US" oldref="17">REM the angle Alpha from the tangent of the angle Alpha:</paragraph>
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<paragraph role="paragraph" id="par_id3146975" l10n="U" xml-lang="en-US" oldref="18">Sub ExampleATN</paragraph>
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<paragraph role="paragraph" id="par_id3151112" l10n="U" xml-lang="en-US" oldref="19">REM rounded Pi = 3.14159 is a predefined constant</paragraph>
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<paragraph role="paragraph" id="par_id3159156" l10n="U" xml-lang="en-US" oldref="20">Dim d1 As Double</paragraph>
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<paragraph role="paragraph" id="par_id3147435" l10n="U" xml-lang="en-US" oldref="21">Dim d2 As Double</paragraph>
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<paragraph role="paragraph" id="par_id3149262" l10n="U" xml-lang="en-US" oldref="22">d1 = InputBox$ ("Enter the length of the side adjacent to the angle: ","Adjacent")</paragraph>
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<paragraph role="paragraph" id="par_id3149482" l10n="U" xml-lang="en-US" oldref="23">d2 = InputBox$ ("Enter the length of the side opposite the angle: ","Opposite")</paragraph>
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<paragraph role="paragraph" id="par_id3155415" l10n="U" xml-lang="en-US" oldref="24">Print "The Alpha angle is"; (atn (d2/d1) * 180 / Pi); " degrees"</paragraph>
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<paragraph role="paragraph" id="par_id3149959" l10n="U" xml-lang="en-US" oldref="25">End Sub</paragraph>
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</body>
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</helpdocument>
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