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find-f-x-0-pi-4-ln-1-xtant-dt-




Question Number 42481 by maxmathsup by imad last updated on 26/Aug/18
find f(x)= ∫_0 ^(π/4) ln(1+xtant)dt .
$${find}\:{f}\left({x}\right)=\:\int_{\mathrm{0}} ^{\frac{\pi}{\mathrm{4}}} {ln}\left(\mathrm{1}+{xtant}\right){dt}\:. \\ $$

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