The projections of a vector on the three...

The projections of a vector on the three coordinate axis are `6, 3, 2` respectively. The direction cosines of the vector are (A) `6,-3,2` (B) `6/5,(-3)/5,2/5` (C) `6/7,(-3)/7,2/7` (D) `(-6)/7,(-3)/7,2/7`

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