Q 1135380262.     If a line has direction ratios `2, − 1, − 2`, then what are its direction cosines?

A

`2/3, (-1)/3, (-2)/3`

B

`2/3, (-1)/3, -2`

C

`2, (-1)/3, (-2)/3`

D

`2/3, (1)/3, (-2)/3`

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