Question Number 63698 by Rio Michael last updated on 07/Jul/19 Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 129233 by MrJoe last updated on 14/Jan/21 $${prove}\:{that} \\ $$$${sin}\:\mathrm{3}{x}=\mathrm{2}{cos}\left(\frac{\mathrm{3}{x}}{\mathrm{2}}\right){sin}\left(\frac{\mathrm{3}{x}}{\mathrm{2}}\right) \\ $$ Commented by MrJoe last updated on 15/Jan/21 $${then}\: \\ $$$${if}\:{sin}\left(\mathrm{3}{x}\right)={sin}\left[\mathrm{2}\left(\frac{\mathrm{3}{x}}{\mathrm{2}}\right)\right] \\…
Question Number 129230 by bramlexs22 last updated on 14/Jan/21 $$\:\mathrm{V}=\int_{\mathrm{0}} ^{\:\mathrm{1}} \mathrm{arctan}\:\left(\frac{\mathrm{x}}{\mathrm{y}}\right)\:\mathrm{dx}\:? \\ $$ Answered by bemath last updated on 14/Jan/21 Terms of Service Privacy…
Question Number 129231 by liberty last updated on 14/Jan/21 $$\:\mathrm{Given}\:\begin{cases}{{a}=\mathrm{sin}\:{x}+\mathrm{sin}\:\mathrm{2}{x}}\\{{b}=\mathrm{cos}\:{x}+\mathrm{cos}\:\mathrm{2}{x}}\end{cases}.\:\mathrm{If}\:\left({a}^{\mathrm{2}} +{b}^{\mathrm{2}} \right)\left({a}^{\mathrm{2}} +{b}^{\mathrm{2}} −\mathrm{3}\right)=\mathrm{cos}\:\mathrm{2}{x}+\mathrm{3cos}\:{x} \\ $$$$\mathrm{then}\:{x}\:=? \\ $$ Answered by MJS_new last updated on 14/Jan/21…
Question Number 129228 by bramlexs22 last updated on 14/Jan/21 $$\:\mathrm{H}\:=\:\int\:\mathrm{tan}\:\mathrm{x}\:\mathrm{tan}\:\mathrm{2x}\:\mathrm{tan}\:\mathrm{3x}\:\mathrm{dx}\:? \\ $$ Commented by som(math1967) last updated on 14/Jan/21 $${Q}\:\mathrm{105440} \\ $$ Terms of Service…
Question Number 63693 by Rio Michael last updated on 07/Jul/19 $${find}\:{the}\:{general}\:{solution}\:{for}\: \\ $$$$\:{sin}\mathrm{5}\theta+{sin}\mathrm{3}\theta=\:\mathrm{1} \\ $$ Commented by Prithwish sen last updated on 07/Jul/19 $$\mathrm{sin5}\theta+\mathrm{sin3}\theta=\mathrm{1} \\…
Question Number 63689 by Rio Michael last updated on 07/Jul/19 $${Show}\:{that}\:\:{if}\:\:{a}\mid{b}\:\:{then}\:{an}\mid{bn} \\ $$ Commented by Prithwish sen last updated on 07/Jul/19 $$\mathrm{lf}\:\mathrm{a}\mid\mathrm{b} \\ $$$$\mathrm{then}\:\mathrm{b}=\mathrm{aq}\:\:\:\left(\mathrm{q}\in\mathrm{N}\:\right) \\…
Question Number 129222 by bramlexs22 last updated on 14/Jan/21 $$\:\mathrm{y}−\mathrm{x}\:\frac{\mathrm{dy}}{\mathrm{dx}}\:=\:\mathrm{a}\left(\mathrm{y}^{\mathrm{2}} +\frac{\mathrm{dx}}{\mathrm{dy}}\:\right) \\ $$ Answered by bobhans last updated on 14/Jan/21 $$\:{y}−{xy}'\:=\:{ay}^{\mathrm{2}} +\frac{{a}}{{y}'} \\ $$$$\:{yy}'−{x}\left({y}'\right)^{\mathrm{2}} ={ay}^{\mathrm{2}}…
Question Number 129223 by bramlexs22 last updated on 14/Jan/21 $$\:\mathrm{W}\:=\:\int\:\frac{\mathrm{cos}\:\mathrm{5x}+\mathrm{cos}\:\mathrm{4x}}{\mathrm{2cos}\:\mathrm{3x}−\mathrm{1}}\:\mathrm{dx}\: \\ $$ Answered by bobhans last updated on 14/Jan/21 $$\:{W}=\int\frac{\mathrm{2cos}\:\left(\frac{\mathrm{9}{x}}{\mathrm{2}}\right)\mathrm{cos}\:\left(\frac{{x}}{\mathrm{2}}\right)}{\mathrm{2cos}\:\mathrm{3}{x}−\mathrm{1}}\:{dx} \\ $$$$\:{W}=\int\:\frac{\mathrm{2cos}\:\left(\frac{\mathrm{9}{x}}{\mathrm{2}}\right)\mathrm{cos}\:\left(\frac{{x}}{\mathrm{2}}\right).\mathrm{sin}\:\mathrm{3}{x}}{\mathrm{2cos}\:\mathrm{3}{x}\mathrm{sin}\:\mathrm{3}{x}−\mathrm{sin}\:\mathrm{3}{x}}\:{dx} \\ $$$$\:{W}=\:\int\:\frac{\mathrm{2cos}\:\left(\frac{\mathrm{9}{x}}{\mathrm{2}}\right)\mathrm{cos}\:\left(\frac{{x}}{\mathrm{2}}\right)\mathrm{sin}\:\mathrm{3}{x}}{\mathrm{sin}\:\mathrm{6}{x}−\mathrm{sin}\:\mathrm{3}{x}}{dx} \\…
Question Number 63684 by Annmuema last updated on 07/Jul/19 $$\mathrm{cot}\:\mathrm{118} \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com