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Find the angle between the following pai...

Find the angle between the following pairs of lines :
`vec(r)=3hat(i)+2hat(j)-4hat(k)+lambda(hat(i)+2hat(j)+2hat(k)) " & " vec(r)=5hat(i)-2hat(j)+mu(3hat(i)+2hat(j)+6hat(k))`
Note : Angle between two lines is the angle between `vec(b_(1)) " and " vec(b_(2))`

Text Solution

Verified by Experts

The correct Answer is:
`rArr theta = cos^(-1)""(19)/(21)`
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