1.

For the vectors A(-1,-2,3) and B(1,2,-1) the direction cosines of vec(AB) are ……………

Answer»

`(1)/(3),(2)/(3),(-2)/(3)`
2, 4, -4
`(2)/(sqrt(6)),(4)/(sqrt(6)),(-4)/(sqrt(6))`
`(-1)/(3),(-2)/(3),(2)/(3)`

ANSWER :A


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