( begin array l triangle ABC- Omega A+B+C= pi হলে, Sigma cot A cot ~B= কত ? end array )

\begin{array}{l} \triangle \mathrm{ABC}-\Omega \mathrm{A}+\mathrm{B}+\mathrm{C}=\pi \text { হলে, } \\ \Sigma \cot \mathrm{A} \cot \mathrm{~B}=\text { কত ? } \end{array}

RCC 24

\begin{array}{l} \triangle \mathrm{ABC}-\Omega \mathrm{A}+\mathrm{B}+\mathrm{C}=\pi \text { হলে, } \\ \Sigma \cot \mathrm{A} \cot \mathrm{~B}=\text { কত ? } \end{array}

RCC 24