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The direction cosines of a line which is...

The direction cosines of a line which is perpendicular to both the lines whose direction ratios are `1,-1,0 and 2,-1,1` are:
a)`-1,-1,1`
b)`(-1)/(sqrt(3)),(-1)/(sqrt(3)),(1)/(sqrt(3))`
c)`1,-1,-1`
d)`(1)/(sqrt(3)),(-1)/(sqrt(3)),(-1)/(sqrt(3))`

A

`-1,-1,1`

B

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

C

`1,-1,-1`

D

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

Text Solution

Verified by Experts

The correct Answer is:
B
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