যদি $\frac{\pi }{2}<\theta <\pi , \sin \theta =\frac{5}{13}$ হয় , তবে $\frac{\tan {\displaystyle \theta }{\displaystyle }{\displaystyle +}{\displaystyle }{\displaystyle s}{\displaystyle e}{\displaystyle c}{\displaystyle (}{\displaystyle -}{\displaystyle \theta }{\displaystyle )}}{cot\theta +\cos ec(-\theta )}$ এর মান কত?