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<B>JACOBINS</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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The <em>Jacobins</em> operator returns the Jacobi Elliptic function ns. 
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<em>Jacobins</em>(&lt;expression&gt;,&lt;integer&gt;) 
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examples: </H3>
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Jacobins(3, 0.9) 

  1.00945801599785 


Jacobins(0.887, 15) 

  0.683578280513975 - 0.85023411082469*i 

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