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If the d.R.s of two lines are 1,-2,-2 an...

If the d.R.s of two lines are `1,-2,-2` and `2,-2,1`, then the measures of the acute angle between them is

A

`cos^(-1)(1/9)`

B

`cos^(-1)(2/9)`

C

`cos^(-1)(1/3)`

D

`cos^(-1)(4/9)`

Text Solution

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