What should be added in vector \[\mathbf{a}=3\mathbf{i}+4\mathbf{j}-2\mathbf{k}\] to get its resultant a unit vector i [Roorkee 1977]

\[-2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]

\[-\,2\mathbf{i}-4\mathbf{j}+2\mathbf{k}\]

\[2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]

What should be added in vector \[\mathbf{a}=3\mathbf{i}+4\mathbf{j}-2\

1.	What should be added in vector \[\mathbf{a}=3\mathbf{i}+4\mathbf{j}-2\mathbf{k}\] to get its resultant a unit vector i [Roorkee 1977]
A.	\[-\,2\mathbf{i}-4\mathbf{j}+2\mathbf{k}\]
B.	\[-2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]
C.	\[2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]
D.	None of these
Answer» B. \[-2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]

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What should be added in vector \[\mathbf{a}=3\mathbf{i}+4\mathbf{j}-2\mathbf{k}\] to get its resultant a unit vector i [Roorkee 1977]

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