Menu Close

Category: Integration

Question-127952

Question Number 127952 by rs4089 last updated on 03/Jan/21 Answered by Ar Brandon last updated on 03/Jan/21 $$\Psi=\int_{\mathrm{0}} ^{\mathrm{1}} \mathrm{x}^{\mathrm{2}} \sqrt{\frac{\mathrm{1}−\mathrm{x}^{\mathrm{2}} }{\mathrm{1}+\mathrm{x}^{\mathrm{2}} }}\mathrm{dx}=\int_{\mathrm{0}} ^{\mathrm{1}} \left\{\frac{\mathrm{x}^{\mathrm{2}}…

Question-127948

Question Number 127948 by rs4089 last updated on 03/Jan/21 Answered by mathmax by abdo last updated on 04/Jan/21 $$\mathrm{A}_{\mathrm{N}} =\int_{\mathrm{0}} ^{\infty} \:\frac{\mathrm{e}^{\mathrm{2}\pi\mathrm{x}} −\mathrm{1}}{\mathrm{e}^{\mathrm{2}\pi\mathrm{x}} +\mathrm{1}}\left(\frac{\mathrm{1}}{\mathrm{x}}−\frac{\mathrm{x}}{\mathrm{N}^{\mathrm{2}} \:+\mathrm{x}^{\mathrm{2}}…

prove-that-0-100-dx-x-100-x-pi-

Question Number 127904 by bramlexs22 last updated on 03/Jan/21 $$\:\mathrm{prove}\:\mathrm{that}\:\int_{\mathrm{0}} ^{\:\mathrm{100}} \:\frac{\mathrm{dx}}{\:\sqrt{\mathrm{x}\left(\mathrm{100}−\mathrm{x}\right)}}\:=\:\pi \\ $$ Answered by liberty last updated on 03/Jan/21 $$\:\mathrm{let}\:\mathrm{x}\:=\:\mathrm{100}\:\mathrm{sin}^{\mathrm{2}} \:\mathrm{t}\:\Rightarrow\mathrm{dx}=\:\mathrm{200}\:\mathrm{sin}\:\mathrm{t}\:\mathrm{cos}\:\mathrm{t}\:\mathrm{dt} \\ $$$$\:\int_{\mathrm{0}}…