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<A NAME=SIN>

<TITLE>SIN</TITLE></A>
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<B>SIN</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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The <em>sin</em> operator returns the sine of its argument. 
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syntax: </H3>
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<em>sin</em>(&lt;expression&gt;) or <em>sin</em> &lt;simple\_expression&gt; 
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&lt;expression&gt; is any valid scalar REDUCE expression, 
&lt;simple\_expression&gt; is a single identifier or begins with a prefix 
operator name. 
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examples: </H3>
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sin aa; 

  SIN(AA) 


sin(pi/2); 

  1 


on rounded; 

sin 3; 

  0.14112000806 


sin(pi/2); 

  1.0

</TT></PRE><P><em>sin</em>returns a numeric value only if <em>rounded</em> is on
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Then the sine is calculated to the current degree of floating point precision. 
The argument in this case is assumed to be in radians. 
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