The direction cosines of the line joinin...

The direction cosines of the line joining the points (-1, -1, -1) and (2, 3, 4) are,

A

`ltlt(-3)/sqrt50,(-4)/sqrt50,(5)/sqrt50gtgt`

B

`ltlt(3)/(5sqrt2),(4)/(5sqrt2),(5)/(5sqrt2)gtgt`

C

`ltlt(3)/sqrt50,(4)/sqrt50,(-5)/sqrt50gtgt`

D

`-3,-4,5`

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