A) \[\frac{1}{\sqrt{5}}\,(2\mathbf{i}-\mathbf{k})\]
B) \[\frac{1}{\sqrt{5}}\,(-2\mathbf{i}+\mathbf{k})\]
C) \[\frac{1}{\sqrt{5}}\,(2\mathbf{i}+\mathbf{j}+\mathbf{k})\]
D) \[\frac{1}{\sqrt{5}}\,(2\mathbf{i}+\mathbf{k})\]
Correct Answer: D
Solution :
Unit vector is equal to \[\frac{\mathbf{a}\times \mathbf{b}}{|\mathbf{a}\times \mathbf{b}|}=\frac{1}{\sqrt{5}}(2\mathbf{i}+\mathbf{k}).\]You need to login to perform this action.
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