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Question Number 220232 by mnjuly1970 last updated on 09/May/25
      prove that      (π/(16)) < ∫_0 ^( 1 ) (√((x(1−x))/(sin(πx)+cos(πx)+2))) dx<(π/8)
$$ \\ $$$$\:\:\:\:{prove}\:{that} \\ $$$$ \\ $$$$\:\:\frac{\pi}{\mathrm{16}}\:<\:\int_{\mathrm{0}} ^{\:\mathrm{1}\:} \sqrt{\frac{{x}\left(\mathrm{1}−{x}\right)}{{sin}\left(\pi{x}\right)+{cos}\left(\pi{x}\right)+\mathrm{2}}}\:{dx}<\frac{\pi}{\mathrm{8}} \\ $$$$\:\:\:\:\: \\ $$
Answered by SdC355 last updated on 10/May/25
∫_0 ^( 1)  -=0.245953.......  (π/(16))=0.196349540......  (π/8)=0.39269908.....  ∴(π/(16))<∫_0 ^( 1)  -<(π/8)
$$\int_{\mathrm{0}} ^{\:\mathrm{1}} \:-=\mathrm{0}.\mathrm{245953}……. \\ $$$$\frac{\pi}{\mathrm{16}}=\mathrm{0}.\mathrm{196349540}…… \\ $$$$\frac{\pi}{\mathrm{8}}=\mathrm{0}.\mathrm{39269908}….. \\ $$$$\therefore\frac{\pi}{\mathrm{16}}<\int_{\mathrm{0}} ^{\:\mathrm{1}} \:-<\frac{\pi}{\mathrm{8}} \\ $$

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