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If the cosine of the angle between the l...

If the cosine of the angle between the lines having d.R.s `1,-1,2` and 0,1,a is `sqrt(3)/2`, then: a=

A

2,6

B

`-2.-6`

C

1,7

D

`-1,-7`

Text Solution

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The correct Answer is:
A, B, C, D
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