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Question Number 175250 by Shrinava last updated on 24/Aug/22

$$\mathrm{If}\mathrm{in}△\mathrm{ABC}\mathrm{and}\mathrm{A}=\frac{2\pi }{3}\mathrm{then}:$$$${\left(\sqrt{\frac{1}{\mathrm{sinB}}}\right)}^3+{\left(\sqrt{\frac{1}{\mathrm{sinC}}}\right)}^3⩾4\sqrt{2}$$

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