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find-cos-3x-ch-2x-dx-




Question Number 59184 by maxmathsup by imad last updated on 05/May/19
find   ∫    ((cos(3x))/(ch(2x)))dx .
$${find}\:\:\:\int\:\:\:\:\frac{{cos}\left(\mathrm{3}{x}\right)}{{ch}\left(\mathrm{2}{x}\right)}{dx}\:. \\ $$

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