Question Number 73569 by Rio Michael last updated on 13/Nov/19 $${let}\:{f}\left({x}\right)\:=\:\frac{{tanx}}{{tan}\mathrm{2}{x}}\:.\:{Find}\:{the}\:{points}\:{of}\:{discontinuity} \\ $$$${of}\:{f}\:{on}\:\left[\mathrm{0},\mathrm{2}\pi\right]\:{and}\:{determine}\:{wether}\:{each}\:{duscontinuity}\:{is} \\ $$$${a}\:{point}\:{discontinuity},{a}\:{jump}\:{discontinuity},{or}\:{a}\:{vertical}\:{asymtote} \\ $$$$ \\ $$ Commented by Rio Michael last updated…
Question Number 73560 by mhmd last updated on 13/Nov/19 $${prove}\:{that}\:\left(\mathrm{1}−{itan}\theta\right)/\left({i}+{cot}\theta\right)={itan}\theta \\ $$$${pleas}\:{sir}\:{help}\:{me}? \\ $$ Commented by MJS last updated on 13/Nov/19 $$\mathrm{it}'\mathrm{s}\:\mathrm{not}\:\mathrm{generally}\:\mathrm{true} \\ $$$$\frac{\mathrm{1}−\mathrm{i}\:\mathrm{tan}\:\theta}{\mathrm{i}+\mathrm{cot}\:\theta}=\mathrm{2sin}\:\theta\:\mathrm{cos}\:\theta\:−\mathrm{tan}\:\theta\:−\mathrm{2i}\:\mathrm{sin}^{\mathrm{2}} \:\theta…
Question Number 7962 by upendrakishor99@gmail.com last updated on 25/Sep/16 $${prove}\:{that}\:\:\:{tanx}<\frac{\mathrm{4}{x}}{\pi}\:{for}\:\mathrm{0}<{x}<\frac{\pi}{\mathrm{4}} \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 7938 by tawakalitu last updated on 24/Sep/16 $${if}\:\:{f}\left({x}\right)\:=\:{xlog}\left({x}\:+\:{r}\right)\:−\:{r}\:\:{and}\:\:{r}^{\mathrm{2}} \:=\:{x}^{\mathrm{2}} \:+\:{y}^{\mathrm{2}} \\ $$$${prove}\:{that}:\:\:{f}_{{xx}} \:+\:{f}_{{yy}} \:\:=\:\:\frac{\mathrm{1}}{{x}\:+\:{r}} \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 7939 by tawakalitu last updated on 24/Sep/16 $${f}\left({x},\:{y}\right)\:=\:{xy}^{\mathrm{3}} \:+\:\mathrm{5}{xy}^{\mathrm{2}} \:+\:\mathrm{2}{x}\:+\:\mathrm{1} \\ $$$${find}:\:\:{f}_{{x}} \:,\:{f}_{{y}} \:,\:{f}_{{xx}} \:,\:{f}_{{yy}} \:,\:{f}_{{xy}} \:,\:{f}_{{yx}} \\ $$ Commented by Rasheed Soomro…
Question Number 7900 by tawakalitu last updated on 23/Sep/16 $${Find}\:{an}\:{equation}\:{of}\:{the}\:{tangent}\:{line}\:{to}\:{the}\:{curve}\: \\ $$$${y}\:=\:{tan}^{\mathrm{2}} {x}\:\:\:{at}\:\:{the}\:{point}\:\:\left(\frac{\pi}{\mathrm{3}},\:\mathrm{3}\right) \\ $$ Commented by sou1618 last updated on 24/Sep/16 $${l}:{tangent}\:{line} \\ $$$$\mathrm{3}={tan}^{\mathrm{2}}…
Question Number 7858 by tawakalitu last updated on 21/Sep/16 $${Find}\:{the}\:{derivative}\:{of}\:\:\:\:{x}^{{sin}\mathrm{2}{x}} \:\:\:{from}\:{the}\: \\ $$$${first}\:{priniple}. \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 138883 by mnjuly1970 last updated on 19/Apr/21 Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 138851 by bramlexs22 last updated on 19/Apr/21 $${Find}\:{max}\:{value}\:{of}\: \\ $$$${x}^{\mathrm{2}} −\mathrm{3}{xy}−\mathrm{2}{y}^{\mathrm{2}} \:{subject}\:{to}\: \\ $$$${x}^{\mathrm{2}} +{xy}+{y}^{\mathrm{2}} =\mathrm{1}. \\ $$ Answered by ajfour last updated…
Question Number 138823 by mnjuly1970 last updated on 18/Apr/21 $$\:\:\:\:\:\:\: \\ $$$$\:\:\:\:\:\:\:\:……\mathscr{N}{ice}\:\:…\:\mathscr{C}{alculus}…… \\ $$$$\:\:\:\:\:\:\:\mathscr{E}{valuate}::\:\:\:\:\:\boldsymbol{\phi}=\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\frac{\mathrm{1}}{}=? \\ $$ Answered by qaz last updated on 18/Apr/21…