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Q 1165580465.     Write the direction cosine of the vector `-2hati+hatj-5hatk`

A

`{(2)/sqrt30,1/sqrt30,(-5)/sqrt30}`

B

`{(-2)/sqrt30,5/sqrt30,(-5)/sqrt30}`

C

`{(-2)/sqrt30,1/sqrt30,(5)/sqrt30}`

D

`{(-2)/sqrt30,1/sqrt30,(-5)/sqrt30}`

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