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A Trigonometric Inequality

Geometry Level 3

In $\Delta ABC$ find the 'Minimum' value of,

$Cot ^{ 2 }$ ${ A }$ + $Cot ^{ 2 }$ ${ B }$ + $Cot ^{ 2 }$ ${ C }$

This question is part of the set Best of Me

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by Samarpit Swain

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