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The angle between the lines vecr = hati ...

The angle between the lines `vecr = hati + 4hatk+ lambda ( 2 hati + hatj - hatk) ` and `vecr =2hati -hatj +3hatk + mu( 3hati + hatk)` is

A

`cos^(-1) ((sqrt(5))/(6))`

B

`cos^(-1) ((sqrt(15))/(6))`

C

`cos^(-1)((1)/(12))`

D

`cos^(-1)((sqrt(15))/(15))`

Text Solution

Verified by Experts

The correct Answer is:
B
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