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Let theta be the angle between the lines...

Let `theta` be the angle between the lines AB and AC, where A, B and C are the three points with co-ordinates `(1,2,-1),(2,0,3),(3,-1,2)` respectively, then `sqrt(462)costheta` is equal to

A

20

B

10

C

30

D

40

Text Solution

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The correct Answer is:
A
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