If two lines have direction cosines l1,m1,n1 and l2,m2,n2 then the co – InterviewSolution

1.

If two lines have direction cosines l1,m1,n1 and l2,m2,n2 then the condition for these lines being perpendicular to each other would be -

Answer»

If two lines have direction cosines

$l_{1}, m_{1}, n_{1}$ and $l_{2}, m_{2}, n_{2}$

then the condition for these lines being perpendicular to each other would be -

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