rapper around <a class="link" href="jacobi_elliptic.html" title="Jacobi Elliptic SN, CN and DN">jacobi_elliptic</a>,
          with:
        </p>
<p>
          <span class="emphasis"><em>nc(u, k) = 1 / cn(u, k)</em></span>
        </p>
<p>
          <span class="inlinemediaobject"><img src="../../../../graphs/jacobi_nc.png" align="middle"></span>
        </p>
</div>
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