<doc>

<legacy_id>1537</legacy_id>

<name>cos</name>

<type>function</type>

<syntax>

<example>the cos of <i>angle</i></example>

<example>cos(<i>angle</i>)</example>

</syntax>

<library></library>

<objects>

</objects>

<synonyms>

</synonyms>

<classification>

<category>Math, Logic, &amp; Dates</category>

</classification>

<references>

<constant tag="pi">pi Constant</constant>

</references>

<history>

<introduced version="1.0">Added.</introduced>

</history>

<platforms>

<mac/>

<windows/>

<linux/>

<ios/>

<android/>

</platforms>

<classes>

<desktop/>

<server/>

<web/>

<mobile/>

</classes>

<security>

</security>

<summary><glossary tag="return">Returns</glossary> the cosine of an angle (in <glossary tag="radian">radians</glossary>).</summary>

<examples>

<example>cos(pi)</example>

<example>the cos of 0</example>

<example>put cos(the startAngle of graphic 3) into field "Cosine"</example>

</examples>

<description>

<p>Use the <b>cos</b> <control_st tag="function">function</control_st> to find the cosine of an angle.</p><p/><p><b>Parameters:</b></p><p>The <i>angle</i> is a positive or <glossary tag="negative">negative</glossary> number, or an <glossary tag="expression">expression</glossary> that <glossary tag="evaluate">evaluates</glossary> to a number.</p><p/><p><b>Value:</b></p><p>The <b>cos</b> <control_st tag="function">function</control_st> <glossary tag="return">returns</glossary> a number between -1 and 1.</p><p/><p><b>Comments:</b></p><p>The <b>cos</b> <control_st tag="function">function</control_st> repeats every 2*pi <glossary tag="radian">radians</glossary>: cos(x) = cos(x + 2 * pi), for any value of x.</p><p/><p>The <b>cos</b> <control_st tag="function">function</control_st> requires its input to be in <glossary tag="radian">radians</glossary>. To provide an angle in <glossary tag="degree">degrees</glossary>, use the following <href tag="dictionary/property/2381.xml">custom function</href>:</p><p/><p> function cosInDegrees angleInDegrees</p><p> return cos(angleInDegrees * pi / 180)</p><p> end cosInDegrees</p>

</description>

</doc>