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Category: Integration

calculate-cosx-cos-3x-dx-

Question Number 100088 by mathmax by abdo last updated on 24/Jun/20 $$\mathrm{calculate}\:\int\:\frac{\mathrm{cosx}}{\mathrm{cos}\left(\mathrm{3x}\right)}\mathrm{dx} \\ $$ Commented by Dwaipayan Shikari last updated on 24/Jun/20 $$−\frac{\mathrm{1}}{\mathrm{2}\sqrt{\mathrm{3}}}{log}\left(\frac{\sqrt{\mathrm{3}}{sin}\theta−{cos}\theta}{\:\sqrt{\mathrm{3}}{sin}\theta+{cos}\theta}\right)+{Constant} \\ $$…

0-1-dx-x-x-1-3-x-1-4-

Question Number 165615 by cortano1 last updated on 05/Feb/22 $$\:\int_{\:\mathrm{0}} ^{\:\mathrm{1}} \:\frac{{dx}}{\:\sqrt{{x}}\:\left(\sqrt[{\mathrm{3}}]{{x}}+\sqrt[{\mathrm{4}}]{{x}}\right)}=? \\ $$ Answered by Ar Brandon last updated on 05/Feb/22 $${I}=\int_{\mathrm{0}} ^{\mathrm{1}} \frac{{dx}}{\:\sqrt{{x}}\left(\sqrt[{\mathrm{3}}]{{x}}+\sqrt[{\mathrm{4}}]{{x}}\right)}\:,\:{x}={t}^{\mathrm{12}}…