The direction cosines of a line satisfy the relations  lambda ( l + m) = n and mn + nl + lm = 0. The value of lamb

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Q 2185167967.     The direction cosines of a line satisfy the relations
lambda ( l + m) = n and mn + nl + lm = 0. The value of lambda, for
which the two lines are perpendicular to each other, is
A

1

B

2

C

1/2`

D

None of these

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