Question Number 126773 by Ar Brandon last updated on 24/Dec/20
Answered by Dwaipayan Shikari last updated on 24/Dec/20
$$\overset{\rightarrow} {{A}}+\overset{\rightarrow} {{B}}+\overset{\rightarrow} {{C}}=\mathrm{0}\hat {{i}}+\hat {{j}}+\mathrm{0}\hat {{k}} \\ $$$$\mathrm{5}\hat {{i}}−\hat {{j}}+\mathrm{4}\hat {{k}}+\overset{\rightarrow} {{C}}=\hat {{j}} \\ $$$$\overset{\rightarrow} {{C}}=−\mathrm{5}\hat {{i}}+\mathrm{2}\hat {{j}}−\mathrm{4}\hat {{k}} \\ $$$$ \\ $$