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The angle between a line with direction ...

The angle between a line with direction ratio proportional to 2,2,1 and a line joining (3,1,4) and (7,2,12) is

A

`cos^(-1)((2)/(3))`

B

`cos^(-1)((-2)/(3))`

C

`tan^(-1)((2)/(3))`

D

None of these

Text Solution

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The correct Answer is:
(a)
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