If l1,m1, n1 and l2,m2, n2 are the direction cosinesof two mutually pe – InterviewSolution

1.	If l1,m1, n1 and l2,m2, n2 are the direction cosinesof two mutually perpendicular lines, show that the direction cosinesof the line perpendicular to both of these are m1n2− m2n1, n1l2− n2l1, l1m2− l2m1.
Answer» If l₁, m₁, n₁ and l₂, m₂, n₂ are the direction cosines of two mutually perpendicular lines, show that the direction cosines of the line perpendicular to both of these are m₁n₂ − m₂n₁, n₁l₂ − n₂l₁, l₁m₂ − l₂m₁.

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