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nice-calculus-prove-that-5pi-0-pi-3-9-3-2pi-8sin-x-sin-2x-dx-6pi-m-n-




Question Number 134672 by mnjuly1970 last updated on 06/Mar/21
                  ....nice    calculus...       prove  that :                (√(5π))≤   ∫_0 ^( (π/3)) ((9(√3))/(2π))(√(8sin(x)−sin(2x))) dx≤(√(6π))          ...m.n....
$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:….{nice}\:\:\:\:{calculus}… \\ $$$$\:\:\:\:\:{prove}\:\:{that}\:: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sqrt{\mathrm{5}\pi}\leqslant\:\:\:\int_{\mathrm{0}} ^{\:\frac{\pi}{\mathrm{3}}} \frac{\mathrm{9}\sqrt{\mathrm{3}}}{\mathrm{2}\pi}\sqrt{\mathrm{8}{sin}\left({x}\right)−{sin}\left(\mathrm{2}{x}\right)}\:{dx}\leqslant\sqrt{\mathrm{6}\pi} \\ $$$$\:\:\:\:\:\:\:\:…{m}.{n}…. \\ $$

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