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pi-2-pi-2-cos-2019-x-cos-2020x-dx-pls-help-




Question Number 112248 by 675480065 last updated on 06/Sep/20
∫_(−((π   )/2)) ^(π/2) cos^(2019) (x)cos(2020x)dx  pls help
$$\int_{−\frac{\pi\:\:\:}{\mathrm{2}}} ^{\frac{\pi}{\mathrm{2}}} \mathrm{cos}^{\mathrm{2019}} \left(\mathrm{x}\right)\mathrm{cos}\left(\mathrm{2020x}\right)\mathrm{dx} \\ $$$$\mathrm{pls}\:\mathrm{help} \\ $$

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