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Category: Integration

prove-that-0-pi-4-sin-x-cos-x-1-sin-x-cos-x-dx-2-cot-1-2-

Question Number 163158 by mnjuly1970 last updated on 04/Jan/22 $$ \\ $$$$\:\:\:\:\:{prove}\:{that} \\ $$$$\int_{\mathrm{0}} ^{\:\frac{\pi}{\mathrm{4}}} \frac{\:{sin}\left({x}\right)+{cos}\left({x}\right)}{\:\sqrt{\mathrm{1}+{sin}\left({x}\right){cos}\left({x}\right)}}\:{dx}=\:\sqrt{\mathrm{2}}\:.{cot}^{\:−\mathrm{1}} \left(\sqrt{\mathrm{2}}\:\right) \\ $$$$\:\:\:−−−−− \\ $$ Answered by mahdipoor last…

f-x-f-x-0-1-f-x-dx-f-0-1-f-x-

Question Number 163119 by tounghoungko last updated on 04/Jan/22 $$\:\:{f}\:'\left({x}\right)=\:{f}\left({x}\right)+\int_{\mathrm{0}} ^{\mathrm{1}} {f}\left({x}\right){dx}\: \\ $$$$\:{f}\left(\mathrm{0}\right)=\mathrm{1}\:\Rightarrow{f}\left({x}\right)=? \\ $$ Answered by mr W last updated on 04/Jan/22 $${y}'={y}+{k}\:{with}\:{k}=\int_{\mathrm{0}}…

let-f-x-x-x-2-dt-lnt-with-x-gt-0-and-x-1-1-prove-that-x-gt-1-x-x-2-xdt-tlnt-f-x-x-x-2-x-2-dt-tlnt-after-find-lim-x-1-f-x-2-calculate-f-x-

Question Number 32043 by abdo imad last updated on 18/Mar/18 $${let}\:{f}\left({x}\right)=\:\int_{{x}} ^{{x}^{\mathrm{2}} } \:\:\:\frac{{dt}}{{lnt}}\:\:{with}\:{x}>\mathrm{0}\:{and}\:{x}\neq\mathrm{1} \\ $$$$\left.\mathrm{1}\right)\:{prove}\:{that}\:\forall\:{x}>\mathrm{1}\:\int_{{x}} ^{{x}^{\mathrm{2}} } \:\:\frac{{xdt}}{{tlnt}}\:\leqslant{f}\left({x}\right)\leqslant\:\int_{{x}} ^{{x}^{\mathrm{2}} } \:\frac{{x}^{\mathrm{2}} {dt}}{{tlnt}}\:\:{after} \\ $$$${find}\:{lim}_{{x}\rightarrow\mathrm{1}}…

cos5x-cos4x-1-2cos3x-dx-

Question Number 163114 by abdullahhhhh last updated on 03/Jan/22 $$\int\left(\frac{\boldsymbol{\mathrm{cos}}\mathrm{5}\boldsymbol{\mathrm{x}}+\boldsymbol{\mathrm{cos}}\mathrm{4}\boldsymbol{\mathrm{x}}}{\mathrm{1}+\mathrm{2}\boldsymbol{\mathrm{cos}}\mathrm{3}\boldsymbol{\mathrm{x}}}\right)\:\boldsymbol{\mathrm{dx}} \\ $$$$\:\: \\ $$ Answered by blackmamba last updated on 04/Jan/22 $$\:\int\:\frac{\frac{{e}^{\mathrm{5}{x}} +{e}^{−\mathrm{5}{x}} }{\mathrm{2}}\:+\frac{{e}^{\mathrm{4}{x}} +{e}^{−\mathrm{4}{x}}…