Question Number 43265 by Cheyboy last updated on 09/Sep/18 Commented by ajfour last updated on 09/Sep/18 Commented by ajfour last updated on 09/Sep/18 $${inclination}\:{of}\:{ED}\:{with}\:{horizontal} \\…
Question Number 108609 by Rio Michael last updated on 18/Aug/20 $$\mathrm{1}\:+\:\mathrm{2}\:+\:\mathrm{3}\:+\:\mathrm{4}\:+\:\mathrm{5}\:+\:…\:\infty\:=\:??? \\ $$ Commented by ajfour last updated on 18/Aug/20 $${S}_{{n}} =\frac{{n}\left({n}+\mathrm{1}\right)}{\mathrm{2}} \\ $$ Answered…
Question Number 43011 by ajfour last updated on 06/Sep/18 Commented by ajfour last updated on 06/Sep/18 $${Determine}\:{as}\:{a}\:{function}\:{of} \\ $$$$\theta,\:{h},{k},\:{a},\:\&\:{b}\:: \\ $$$$\:\frac{{A}_{{blue},{max}} }{{A}_{{ellipse}} }\:=\:\:\frac{{max}\:{blue}\:{area}}{\pi{ab}}\:. \\ $$$$…
Question Number 174069 by alcohol last updated on 24/Jul/22 Commented by alcohol last updated on 24/Jul/22 $${please}\:{help}\:{me}\: \\ $$ Answered by aleks041103 last updated on…
Question Number 42863 by ajfour last updated on 03/Sep/18 Commented by ajfour last updated on 04/Sep/18 $${The}\:{two}\:{parabolas}\:{have}\:{a}\:{common} \\ $$$${vertex}\:{and}\:{have}\:{the}\:{same}\:{distance} \\ $$$${from}\:{vertex}\:{to}\:{focus}\:'\boldsymbol{{a}}'. \\ $$$${Find}\:{the}\:{angle}\:\boldsymbol{\theta}\:{between}\:{their} \\ $$$${axes}\:{if}\:{their}\:{branches}\:{that}\:{are}…
Question Number 42698 by Rio Michael last updated on 31/Aug/18 $${A}\:{boy}\:{lying}\:{flat}\:{on}\:{level}\:{ground}\:{sees}\:{a}\:{bird}\:\:{on}\:{a}\:{tree}\:{and}\:{the} \\ $$$${angle}\:{of}\:{Elevation}\:{from}\:{the}\:{boy}\:{to}\:{the}\:{birth}\:{is}\:\mathrm{42}°,{if}\:{the}\:{boy} \\ $$$${is}\:\mathrm{6}{m}\:{from}\:{the}\:{tree}.{find}\:{the}\:{hieght}\:{of}\:{the}\:{tree}\:{if}\:{the}\:{bird} \\ $$$${is}\:{at}\:{the}\:{top}\:{of}\:{the}\:{tree} \\ $$ Answered by math1967 last updated on…
Question Number 42624 by ajfour last updated on 29/Aug/18 Commented by ajfour last updated on 29/Aug/18 $${The}\:{smaller}\:{circle}\:{has}\:{radius}\:\boldsymbol{{r}}. \\ $$$${The}\:{two}\:{parabolas}\:{are}\:{reflection} \\ $$$${of}\:{one}\:{another}\:{in}\:{x}-{axis}. \\ $$$${Equation}\:{of}\:{upper}\:{parabola}\:{is} \\ $$$$\:{y}={ax}^{\mathrm{2}}…
Question Number 42340 by ajfour last updated on 23/Aug/18 Commented by ajfour last updated on 23/Aug/18 $${Find}\:\boldsymbol{{r}}\:{in}\:{terms}\:{of}\:\boldsymbol{{R}}\:{and}\:\boldsymbol{{a}}. \\ $$ Commented by MJS last updated on…
Question Number 173352 by cortano1 last updated on 10/Jul/22 Answered by mr W last updated on 10/Jul/22 $${x}_{{n}+\mathrm{1}} ^{\mathrm{2}} =\frac{\mathrm{2}{x}_{{n}} }{{x}_{{n}} +\mathrm{1}} \\ $$$$\left(\frac{\mathrm{1}}{{x}_{{n}+\mathrm{1}} }\right)^{\mathrm{2}}…
Question Number 107696 by ajfour last updated on 12/Aug/20 Commented by ajfour last updated on 12/Aug/20 $${If}\:{both}\:{circles}\:{have}\:{the}\:{equal}\:{radius}, \\ $$$${find}\:{the}\:{radius}. \\ $$ Answered by mr W…