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In-ABC-36-R-r-m-b-2-m-c-2-sin-B-sin-C-9-R-4-2-r-2-




Question Number 177698 by Shrinava last updated on 08/Oct/22
In  △ABC  36 R r ≤ Σ ((m_b ^2  + m_c ^2 )/(sin B sin C)) ≤ ((9 R^4 )/(2 r^2 ))
$$\mathrm{In}\:\:\bigtriangleup\mathrm{ABC} \\ $$$$\mathrm{36}\:\mathrm{R}\:\mathrm{r}\:\leqslant\:\Sigma\:\frac{\mathrm{m}_{\boldsymbol{\mathrm{b}}} ^{\mathrm{2}} \:+\:\mathrm{m}_{\boldsymbol{\mathrm{c}}} ^{\mathrm{2}} }{\mathrm{sin}\:\mathrm{B}\:\mathrm{sin}\:\mathrm{C}}\:\leqslant\:\frac{\mathrm{9}\:\mathrm{R}^{\mathrm{4}} }{\mathrm{2}\:\mathrm{r}^{\mathrm{2}} } \\ $$

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