Code:   

$ \,\,\,\,\,-\frac{{\cos^{2}\theta_{\,{\rm{i}}}\,}}{{sen\,\theta_{\,{\rm{i}}}}} $

There are 1805561 latex formulas cached as of Today, at 10:38 pm
There are 12745 asymptote images cached as of Today, at 10:38 pm