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Find the direction cosines of the line w...

Find the direction cosines of the line which is perpendicular to the lines with direction cosines proportional to (1, -2, -2) and (0, 2, 1)

A

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

B

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

C

`(1)/(sqrt3), (1)/(sqrt3), (1)/(sqrt3)`

D

`(1)/(sqrt3), -(1)/(sqrt3), (1)/(sqrt3)`

Text Solution

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The correct Answer is:
A
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