Find the direction cosines of the vector...

Find the direction cosines of the vector `2hati+2hatj-hatk`

A

`2/3,1/3,1/3`

B

`1/3,1/3,2/3`

C

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

D

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

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The correct Answer is:

D

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