Question Number 128743 by bemath last updated on 10/Jan/21 $$\:\:\:\:\:\mathrm{sin}\:^{\mathrm{3}} \mathrm{x}\:+\:\mathrm{cos}\:^{\mathrm{3}} \mathrm{x}\:+\:\mathrm{sin}\:\mathrm{x}\:\mathrm{cos}\:\mathrm{x}\:=\:\mathrm{1} \\ $$$$\:\:\:\mathrm{Find}\:\mathrm{x}\:. \\ $$ Answered by liberty last updated on 10/Jan/21 $$\:\mathrm{sin}\:^{\mathrm{3}} \mathrm{x}+\mathrm{cos}\:^{\mathrm{3}}…
Question Number 63206 by lalitchand last updated on 30/Jun/19 Commented by lalitchand last updated on 30/Jun/19 $$\mathrm{question}\:\mathrm{number}\:\mathrm{8} \\ $$ Answered by arcana last updated on…
Question Number 128740 by bemath last updated on 10/Jan/21 $$\:\:\underset{\mathrm{n}\:=\:\mathrm{0}} {\overset{\infty} {\sum}}\frac{\mathrm{1}}{\left(\mathrm{n}+\mathrm{1}\right)\left(\mathrm{n}+\mathrm{3}\right)\mathrm{n}!}\:=?\: \\ $$ Answered by liberty last updated on 10/Jan/21 $$\:\underset{\mathrm{n}=\mathrm{0}} {\overset{\infty} {\sum}}\:\frac{\mathrm{n}+\mathrm{2}}{\left(\mathrm{n}+\mathrm{3}\right)\left(\mathrm{n}+\mathrm{2}\right)\left(\mathrm{n}+\mathrm{1}\right)\mathrm{n}!}\:=\:\underset{\mathrm{n}=\mathrm{0}} {\overset{\infty}…
Question Number 63203 by lalitchand last updated on 30/Jun/19 Commented by lalitchand last updated on 30/Jun/19 $$\mathrm{question}\:\mathrm{number}\:\mathrm{6} \\ $$ Commented by arcana last updated on…
Question Number 128736 by mnjuly1970 last updated on 09/Jan/21 $$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:…\:{nice}\:\:\:{calculus}… \\ $$$$ \\ $$$$\:\:\:\:\:{evluate}\::: \\ $$$$\:\:\:\:\:\phi\:=\:\int_{\mathrm{0}} ^{\:\infty} {e}^{−{x}^{\mathrm{2}} } {cos}\left({x}\right){dx}=? \\ $$$$ \\ $$ Commented…
Question Number 128733 by harckinwunmy last updated on 09/Jan/21 $${Where}\:{can}\:{i}\:{download}\:{free}\:{pdf}\:{text}\:{books}? \\ $$ Commented by Dwaipayan Shikari last updated on 09/Jan/21 www.pdfdrive.com Commented by harckinwunmy last…
Question Number 128731 by TITA last updated on 09/Jan/21 $$\mathrm{for}\:\:\mathrm{a}>\mathrm{b}>\mathrm{0}\:\:\mathrm{show}\:\mathrm{that} \\ $$$$\mathrm{b}<\frac{\mathrm{ax}^{\mathrm{x}} +\mathrm{bx}^{−\mathrm{x}} }{\mathrm{e}^{\mathrm{x}} +\mathrm{e}^{−\mathrm{x}} }<\mathrm{a} \\ $$ Commented by TITA last updated on 09/Jan/21…
Question Number 63194 by lalitchand last updated on 30/Jun/19 Answered by mr W last updated on 30/Jun/19 $$\frac{\Delta{AQR}}{\Delta{ABC}}=\left(\frac{{AQ}}{{AB}}\right)^{\mathrm{2}} =\left(\frac{\mathrm{2}}{\mathrm{3}}\right)^{\mathrm{2}} =\frac{\mathrm{4}}{\mathrm{9}} \\ $$$$\frac{\Delta{APS}}{\Delta{ABC}}=\left(\frac{{AP}}{{AB}}\right)^{\mathrm{2}} =\left(\frac{\mathrm{1}}{\mathrm{3}}\right)^{\mathrm{2}} =\frac{\mathrm{1}}{\mathrm{9}} \\…
Question Number 128729 by harckinwunmy last updated on 09/Jan/21 Commented by harckinwunmy last updated on 09/Jan/21 $${Please}\:{i}\:{need}\:{urgent}\:{help}\:{on}\:{that}.\:{Thanks} \\ $$ Terms of Service Privacy Policy Contact:…
Question Number 63190 by Tawa1 last updated on 30/Jun/19 $$\mathrm{Test}\:\mathrm{its}\:\mathrm{convergence}:\:\:\:\:\:\:\:\:\underset{\mathrm{n}\:=\:\mathrm{1}} {\overset{\infty} {\sum}}\:\frac{\mathrm{1}}{\mathrm{n}^{\mathrm{3}} \:\mathrm{sin}^{\mathrm{2}} \mathrm{n}} \\ $$ Commented by mathmax by abdo last updated on 01/Jul/19…