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Author: Tinku Tara

advanced-calculus-prove-that-0-1-x-sin-2pix-dx-pi-2-

Question Number 138041 by mnjuly1970 last updated on 09/Apr/21 $$\:\:\:\:\:\:\:\:\:\:\:…….{advanced}\:…\:…\:…\:{calculus}…… \\ $$$$\:\:{prove}\:\:{that}\:::: \\ $$$$\:\:\:\:\:\boldsymbol{\phi}=\int_{\mathrm{0}} ^{\:\mathrm{1}} \psi\left({x}\right).{sin}\left(\mathrm{2}\pi{x}\right){dx}=−\frac{\pi}{\mathrm{2}}\:…\checkmark \\ $$$$ \\ $$ Answered by Dwaipayan Shikari last…

States-The-increase-in-the-population-of-a-country-is-proportional-to-that-population-The-population-doubles-every-50-years-How-quickly-does-it-triple-

Question Number 138037 by greg_ed last updated on 09/Apr/21 $$\underline{\boldsymbol{\mathrm{States}}} \\ $$$$\boldsymbol{\mathrm{The}}\:\boldsymbol{\mathrm{increase}}\:\boldsymbol{\mathrm{in}}\:\boldsymbol{\mathrm{the}}\:\boldsymbol{\mathrm{population}}\:\boldsymbol{\mathrm{of}}\:\boldsymbol{\mathrm{a}}\:\boldsymbol{\mathrm{country}}\:\boldsymbol{\mathrm{is}} \\ $$$$\boldsymbol{\mathrm{proportional}}\:\boldsymbol{\mathrm{to}}\:\boldsymbol{\mathrm{that}}\:\boldsymbol{\mathrm{population}}. \\ $$$$\boldsymbol{\mathrm{The}}\:\boldsymbol{\mathrm{population}}\:\boldsymbol{\mathrm{doubles}}\:\boldsymbol{\mathrm{every}}\:\mathrm{50}\:\boldsymbol{\mathrm{years}}. \\ $$$$\boldsymbol{\mathrm{How}}\:\boldsymbol{\mathrm{quickly}}\:\boldsymbol{\mathrm{does}}\:\boldsymbol{\mathrm{it}}\:\boldsymbol{\mathrm{triple}}\:? \\ $$ Answered by MJS_new last updated…

Karanja-and-Ouma-can-do-a-certain-job-in-6-days-Karanja-alone-can-do-the-work-in-5-days-more-than-Ouma-How-many-days-can-Karanja-take-to-do-the-job-alone-

Question Number 72498 by Mr Jor last updated on 29/Oct/19 $${Karanja}\:{and}\:{Ouma}\:{can}\:{do}\:{a}\: \\ $$$${certain}\:{job}\:{in}\:\mathrm{6}\:{days}.\:{Karanja}\: \\ $$$${alone}\:{can}\:{do}\:{the}\:{work}\:{in}\:\mathrm{5}\:{days} \\ $$$${more}\:{than}\:{Ouma}.\:{How}\:{many}\: \\ $$$${days}\:{can}\:{Karanja}\:{take}\:{to}\:{do}\:{the} \\ $$$${job}\:{alone}? \\ $$ Answered by…

if-cot-cosec-1-3-then-find-the-value-of-where-0-lt-2pi-

Question Number 72497 by Shamim last updated on 29/Oct/19 $$\mathrm{if},\:\mathrm{cot}\:\theta+\mathrm{cosec}\:\theta=\frac{\mathrm{1}}{\:\sqrt{\mathrm{3}}}\:\mathrm{then}\:\mathrm{find}\:\mathrm{the}\:\mathrm{value} \\ $$$$\mathrm{of}\:\theta\:\mathrm{where}\:\mathrm{0}<\theta\leqslant\mathrm{2}\pi. \\ $$ Answered by behi83417@gmail.com last updated on 29/Oct/19 $$\frac{\mathrm{cos}\theta}{\mathrm{sin}\theta}+\frac{\mathrm{1}}{\mathrm{sin}\theta}=\frac{\mathrm{1}}{\:\sqrt{\mathrm{3}}}\Rightarrow\frac{\mathrm{1}+\mathrm{cos}\theta}{\mathrm{sin}\theta}=\frac{\mathrm{1}}{\:\sqrt{\mathrm{3}}}\Rightarrow \\ $$$$\frac{\mathrm{2cos}^{\mathrm{2}} \frac{\theta}{\mathrm{2}}}{\mathrm{2sin}\frac{\theta}{\mathrm{2}}\mathrm{cos}\frac{\theta}{\mathrm{2}}}=\frac{\mathrm{1}}{\:\sqrt{\mathrm{3}}}\Rightarrow\begin{cases}{\mathrm{1}.\mathrm{cos}\frac{\theta}{\mathrm{2}}=\mathrm{0}}\\{\mathrm{2}.\mathrm{cot}\frac{\theta}{\mathrm{2}}=\frac{\mathrm{1}}{\:\sqrt{\mathrm{3}}}}\end{cases}…