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The angle between the straight line vec ...

The angle between the straight line `vec r =(2-3t) hat i+(1+2t)hatj+(2+6t) hatk and vec r= (1+4s) hati+(2-s) hatj+ (8s-1) hatk ` is a)`cos^-1 (sqrt(41)/34)` b)`cos^-1 (21/34)` c)`cos^-1 (43/63)` d)`cos^-1 (34/63)`

A

`cos^-1 (sqrt(41)/34)`

B

`cos^-1 (21/34)`

C

`cos^-1 (43/63)`

D

`cos^-1 (34/63)`

Text Solution

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The correct Answer is:
D
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