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<h3 class="toggle">Table of Contents</h3>
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<li class="level2"><div class="li"><a href="el_cos.html#cos">Cos</a></div>
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<li class="level3"><div class="li"><a href="el_cos.html#format">Format</a></div></li>
<li class="level3"><div class="li"><a href="el_cos.html#description">Description</a></div></li>
<li class="level3"><div class="li"><a href="el_cos.html#note">Note</a></div></li>
<li class="level3"><div class="li"><a href="el_cos.html#see_also">See Also</a></div></li>
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<h2 class="sectionedit1" id="cos">Cos</h2>
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<h3 class="sectionedit2" id="format">Format</h3>
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<p>
<strong>cos</strong> ( <em>expression</em> )
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<h3 class="sectionedit3" id="description">Description</h3>
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<p>
Computes the cosine of <em>expression</em>. <em>Expression</em> must be in radians.
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<h3 class="sectionedit4" id="note">Note</h3>
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The cos function does not produce an exact result.
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<h3 class="sectionedit5" id="see_also">See Also</h3>
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<a href="el_acos.html" class="wikilink1" title="el:acos">Acos</a>, <a href="el_asin.html" class="wikilink1" title="el:asin">Asin</a>, <a href="el_atan.html" class="wikilink1" title="el:atan">Atan</a>, <a href="el_degrees.html" class="wikilink1" title="el:degrees">Degrees</a>, <a href="el_radians.html" class="wikilink1" title="el:radians">Radians</a>, <a href="el_sin.html" class="wikilink1" title="el:sin">Sin</a>, <a href="el_tan.html" class="wikilink1" title="el:tan">Tan</a>
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<h3 class="sectionedit6" id="example">Example</h3>
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<pre class="code">clg
color black
# draw a line across the graphic output
line 0,150,300,150
# where do we start
lastx = 0
lasty = cos(0) * 50 + 150
# now step across the line and draw
for x = 0 to 300 step 5
angle = x / 300 * 2 * pi
y = cos(angle) * 50 + 150
line lastx, lasty, x, y
lastx = x
lasty = y
next x</pre>
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Draws<br/>
<a href="http://doc.basic256.org/lib/exe/detail.php?id=el_cos&media=el:cos.jpg" class="media wikilink2" title="el:cos.jpg"><img src="lib/exe/en_cos.jpg" class="media" title="Cosine Curve" alt="Cosine Curve" /></a>
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<div class="docInfo"><bdi>el/cos.txt</bdi> · Last modified: 2014/01/11 23:26 (external edit)</div>
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