\( \triangle A B C \) में, सिद्ध कीजिए कि \[ \cot A+\cot B+\cot C=\frac{a^{2}+b^{2}+c^{2}}{4 \De...

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\( \triangle A B C \) में, सिद्ध कीजिए कि
\[
\cot A+\cot B+\cot C=\frac{a^{2}+b^{2}+c^{2}}{4 \Delta}
\]
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