n</a>:
      </p>
<p>
        <span class="inlinemediaobject"><img src="../../../equations/asinh3.svg"></span>
      </p>
<p>
        For 0.5 &gt; x &gt; &#949; the following rearrangement of the primary definition
        is used:
      </p>
<p>
        <span class="inlinemediaobject"><img src="../../../equations/asinh4.svg"></span>
      </p>
<p>
        Otherwise evalution is via the <a href="http://functions.wolfram.com/ElementaryFunctions/ArcSinh/02/" target="_top">primary
        definition</a>:
     