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The cosine of the angle between the line...

The cosine of the angle between the lines `vecr=3hati+2hatj-4hatk+lambda(hati+2hatj+2hatk)` and `vecr=5hati-2hatj+mu(3hati+2hatj+6hatk)` is -

A

`(17)/(21)`

B

`-(17)/(21)`

C

`-(19)/(21)`

D

`(19)/(21)`

Text Solution

Verified by Experts

The correct Answer is:
D
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 4
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