\[{{}_{2}\phi_{2}}\left({\ifrac{c^{2}}{b^{2}},b^{2}\atop c,cq};q^{2},q\right)=%
\frac{1}{2}\frac{\left(b^{2},q;q^{2}\right)_{\infty}}{\left(c,cq;q^{2}\right)_%
{\infty}}{\left(\frac{\left(c/b;q\right)_{\infty}}{\left(b;q\right)_{\infty}}+%
\frac{\left(-c/b;q\right)_{\infty}}{\left(-b;q\right)_{\infty}}\right)}.\]