h
    of the hypotenuse of a right-angled triangle with sides of length
    <code class="code">x</code> and <code class="code">y</code>, or, equivalently, the distance of the point <code class="code">(x,y)</code>
    to origin.  If one of <code class="code">x</code> or <code class="code">y</code> is infinite, returns <code class="code">infinity</code>
    even if the other is <code class="code">nan</code>.</p>
</div>
</div>

<pre><span id="VALcosh"><span class="keyword">val</span> cosh</span> : <code class=