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Cosine of the angle between the lines ov...

Cosine of the angle between the lines `overliner=5hati-hatj+4hatk+lamda(hati+2hatj+2hatk)`and `overliner=7hati+2hatj+2hatk+mu(3hati+2hatj+6hatk)`is

A

0

B

`(1)/(2)`

C

`(19)/(21)`

D

`(1)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
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