]> $$\begin{array}{ccc}Z\left(\phi ,k\right)& =& E\left(\phi ,k\right)-\frac{E\left(k\right)F\left(\phi ,k\right)}{K\left(k\right)}\\ & =& \frac{k^2}{3K\left(k\right)}\sin \phi \cos \phi \sqrt{\left(1-k^2{\sin }^2\phi \right)}{R}_J\left(\mathrm{0,1}-k^2,\mathrm{1,1}-k^2{\sin }^2\phi \right)\end{array}$$