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Extensible Markup Language  |  2002-01-24  |  2.6 KB  |  41 lines
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <html><head><title>Tan Function [Runtime]</title><meta name="filename" content="text/sbasic/common/03080104"/><meta name="language" content="en-US"/><help:css-file-link xmlns:help="http://openoffice.org/2000/help"/><!--The CSS style header method for setting styles--><style type="text/css">
  3.  
  4.         p.P1{
  5.                 }
  6.         p.P2{
  7.                 }
  8.         span.T1{
  9.                 font-weight:bold;}
  10.         </style></head><body>
  11.   
  12.   
  13.   <help:to-be-embedded Eid="tan" xmlns:help="http://openoffice.org/2000/help">
  14.   <p class="Head1"><help:link Id="66397">Tan Function [Runtime]</help:link></p>
  15.   <p class="Paragraph">Determines the tangent of an angle. The angle will be returned in radians.</p>
  16.   </help:to-be-embedded>
  17.   <p class="Paragraph">Using the angle Alpha, the Tan Function calculates the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle in a right-angled triangle.</p>
  18.   <p class="Paragraph">Tan(Alpha) = side opposite the angle/side adjacent to angle</p>
  19.   <p class="Paragraph"><span class="T1">Syntax</span>:</p>
  20.   <p class="Paragraph">Tan (Number) <help:key-word value="Tan" tag="kw66397_1" xmlns:help="http://openoffice.org/2000/help"/></p>
  21.   <p class="Paragraph"><span class="T1">Return value</span>:</p>
  22.   <p class="Paragraph">Double</p>
  23.   <p class="Paragraph"><span class="T1">Parameter</span>:</p>
  24.   <p class="Paragraph">Number: Any numeric expression for which to calculate the tangent in radians.</p>
  25.   <p class="Paragraph">To convert degrees to radians, multiply by Pi/180. To convert radians to degrees, multiply by 180/Pi.</p>
  26.   <p class="Paragraph">grad=(radiant*180)/pi</p>
  27.   <p class="Paragraph">radiant=(grad*pi)/180</p>
  28.   <p class="Paragraph">Pi is approximately 3.141593.</p>
  29.   <p class="P2">Example:</p>
  30.   <p class="PropText">REM In this example, the following entry is possible for a right-angled triangle:</p>
  31.   <p class="PropText">REM The side opposite the angle and the angle (in degrees) to calculate the length of the side adjacent to the angle:</p>
  32.   <p class="PropText">Sub ExampleTangens</p>
  33.   <p class="PropText">REM Pi = 3.1415926 is a pre-defined variable</p>
  34.   <p class="PropText">Dim d1 as Double</p>
  35.   <p class="PropText">Dim dAlpha as Double</p>
  36.   <p class="PropText">d1 = InputBox$ ("Enter the length of the side opposite the angle: ","opposite")</p>
  37.   <p class="PropText">dAlpha = InputBox$ ("Enter the Alpha angle (in degrees): ","Alpha")</p>
  38.   <p class="PropText">Print "the length of the side adjacent the angle is"; (d1 / tan (dAlpha * Pi / 180))</p>
  39.   <p class="PropText">End Sub</p>
  40.   <p class="PropText"/>
  41.  </body></html>