If direction cosines of a vector of magnitude 3 are 2-3-9-3-2-3 and a - 0 then vector is

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If direction cosines of a vector of magnitude 3 are $\frac{2}{3}, - \frac{9}{3}, \frac{2}{3}$ and a > 0 then vector is____________

2i + j + 0k

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2i - j + 2k

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i – 2j + 2k

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3

\frac{2}{3}, - \frac{1}{3}, \frac{2}{3}

a > 0

3

\frac{2}{3}, \frac{- a}{3}, \frac{2}{3}, a > 0

If direction cosines of a vector of magnitude 3 are $\frac{2}{3}, - \frac{9}{3}, \frac{2}{3}$ and a > 0 then vector is____________

3

\frac{2}{3}, \frac{- 1}{3}, \frac{2}{3}

a > 0

\frac{3}{5 \sqrt{2}}, \frac{4}{5 \sqrt{2}}

\frac{1}{\sqrt{2}}

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