>)</samp></dt><dd class="col-md-8"> absolute value function</dd>
<dt class="col-md-4"> <samp>acos(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> arc cosine function</dd>
<dt class="col-md-4"> <samp>acosh(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> inverse hyperbolic cosine function</dd>
<dt class="col-md-4"> <samp>airy(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> Airy function (max=1, min=0); airy(<var>x</var>)=[jinc(<var>x</var>)]<sup>2</sup>=[2*j1(<var>pi*x</var