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Category: Integration

calculatef-a-0-ln-1-at-2-1-t-4-dt-with-a-gt-0-2-find-the-value-of-0-ln-3-t-2-1-t-4-dt-

Question Number 51834 by Abdo msup. last updated on 31/Dec/18 $${calculatef}\left({a}\right)=\:\int_{\mathrm{0}} ^{\infty} \:\:\frac{{ln}\left(\mathrm{1}+{at}^{\mathrm{2}} \right)}{\mathrm{1}+{t}^{\mathrm{4}} }{dt}\:\:{with}\:{a}>\mathrm{0}. \\ $$$$\left.\mathrm{2}\right){find}\:{the}\:{value}\:{of}\:\int_{\mathrm{0}} ^{\infty} \:\:\:\frac{{ln}\left(\mathrm{3}+{t}^{\mathrm{2}} \right)}{\mathrm{1}+{t}^{\mathrm{4}} }{dt}. \\ $$ Commented by…

find-dx-cosx-cos-2x-cos-3x-

Question Number 51824 by Abdo msup. last updated on 30/Dec/18 $${find}\:\int\:\:\:\frac{{dx}}{{cosx}\:+{cos}\left(\mathrm{2}{x}\right)+{cos}\left(\mathrm{3}{x}\right)} \\ $$ Answered by tanmay.chaudhury50@gmail.com last updated on 31/Dec/18 $$\int\frac{{dx}}{{cos}\mathrm{2}{x}+\mathrm{2}{cos}\mathrm{2}{x}.{cosx}} \\ $$$$\int\frac{{dx}}{{cos}\mathrm{2}{x}\left(\mathrm{1}+\mathrm{2}{cosx}\right)} \\ $$$$\int\frac{{dx}}{\left(\mathrm{2}{cos}^{\mathrm{2}}…

1-tan-1-x-2-dx-2-tan-1-x-dx-

Question Number 117342 by bemath last updated on 11/Oct/20 $$\:\left(\mathrm{1}\right)\int\:\left(\mathrm{tan}^{−\mathrm{1}} \left(\mathrm{x}\right)\right)^{\mathrm{2}} \:\mathrm{dx}\:=\:? \\ $$$$\left(\mathrm{2}\right)\:\int\:\mathrm{tan}^{−\mathrm{1}} \left(\sqrt{\mathrm{x}}\right)\:\mathrm{dx}\:=? \\ $$ Answered by mathmax by abdo last updated on…

Question-117311

Question Number 117311 by eric last updated on 10/Oct/20 Answered by Dwaipayan Shikari last updated on 10/Oct/20 $$\underset{{n}=\mathrm{0}} {\overset{\infty} {\sum}}\frac{\left(−\mathrm{1}\right)^{{n}} }{\mathrm{2}{n}+\mathrm{1}}=\mathrm{1}−\frac{\mathrm{1}}{\mathrm{3}}+\frac{\mathrm{1}}{\mathrm{5}}−\frac{\mathrm{1}}{\mathrm{7}}+….. \\ $$$${tan}^{−\mathrm{1}} {x}={x}−\frac{{x}^{\mathrm{3}} }{\mathrm{3}}+\frac{{x}^{\mathrm{5}}…