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Find the angle between the lines vecr = ...

Find the angle between the lines `vecr = lambda(hat(i) + hat(j) + 2hat(k))` and `vecr = 2hat(j) + mu{(sqrt(3) - 1)hat(i) - (sqrt(3) + 1)hat(j) + 4hat(k)}`.

Text Solution

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The correct Answer is:
`(pi)/(3)`
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