A) \[\left( \frac{1}{\sqrt{2}},\,\,\frac{1}{\sqrt{3}},\,\,\frac{1}{\sqrt{6}} \right)\]
B) \[\left( \frac{1}{\sqrt{6}},\,\,\frac{1}{\sqrt{6}},\,\,\frac{1}{\sqrt{6}} \right)\]
C) \[\left( -\frac{1}{\sqrt{6}},\,\,-\frac{1}{\sqrt{6}},\,-\,\frac{1}{\sqrt{6}} \right)\]
D) \[\left( \frac{1}{\sqrt{3}},\,\,\frac{1}{\sqrt{3}},\,\frac{1}{\sqrt{3}} \right)\]
Correct Answer: D
Solution :
Resultant vector \[=2\mathbf{i}+2\mathbf{j}+2\mathbf{k}.\] Direction cosines are \[\left( \frac{1}{\sqrt{3}},\,\,\frac{1}{\sqrt{3}},\,\,\frac{1}{\sqrt{3}} \right)\,.\]You need to login to perform this action.
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