an>
<a name="l00100"></a>00100 
<a name="l00101"></a>00101          <span class="comment">! These formulae are taken directly from Brink &amp; Satchler.</span>
<a name="l00102"></a>00102 
<a name="l00103"></a>00103          cosb = cos(beta)
<a name="l00104"></a>00104          sinb = sin(beta)
<a name="l00105"></a>00105 
<a name="l00106"></a>00106          coshb = cos(beta / 2.0)
<a name="l00107"></a>00107          sinhb = sin(beta / 2.0)
<a name="l00108"></a>00108 
<a name="l00109"></a>00109          dl(- 1