Category: Vector

Question Number 127566 by Ar Brandon last updated on 30/Dec/20 Answered by bramlexs22 last updated on 30/Dec/20 $$\left(\overset{\rightarrow} {\mathrm{a}}+\overset{\rightarrow} {\mathrm{b}}\right)×\left(\overset{\rightarrow} {\mathrm{a}}−\overset{\rightarrow} {\mathrm{b}}\right)=\overset{\rightarrow} {\mathrm{a}}×\overset{\rightarrow} {\mathrm{a}}−\overset{\rightarrow} {\mathrm{a}}×\overset{\rightarrow}…

Question Number 61823 by necx1 last updated on 09/Jun/19 $$IfD,EandFaremidpointsofthesides$$$$BC,CAandABrespectivelyofthe△ABC$$$$andObeanypoint.Provethat$$$$O\overrightarrow{A}+O\overrightarrow{B}+O\overrightarrow{C}=O\overrightarrow{D}+O\overrightarrow{E}+O\overrightarrow{F}$$ Answered…

Question Number 126778 by Ar Brandon last updated on 24/Dec/20 Answered by Dwaipayan Shikari last updated on 24/Dec/20 $$\sqrt{\left(\overset{\rightarrow} {{A}}_{\mathrm{1}} \right)^{\mathrm{2}} +\left(\overset{\rightarrow} {{A}}_{\mathrm{2}} \right)^{\mathrm{2}} +\mathrm{2}\mid\overset{\rightarrow}…

Question Number 126627 by sdfg last updated on 22/Dec/20 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 126567 by sdfg last updated on 21/Dec/20 Answered by physicstutes last updated on 22/Dec/20 $$\mathbf{A}=(k,k)\mathrm{and}\mathbf{B}=(-3,4)$$$$\mathbf{A}.\mathbf{B}=\mid \mathbf{A}\mid \mid \mathbf{B}\mid \cos \theta$$$$\Rightarrow -3k+4k=k$$$$\Rightarrow\:{k}\:=\:\sqrt{{k}^{\mathrm{2}} +{k}^{\mathrm{2}} }\:.\sqrt{\left(−\mathrm{3}\right)^{\mathrm{2}}…