If L1,M1,N1 and L2,M3,N2 be the direction Cosines of two mutually perpendicular lines , then show that direction Cosines of the line perpendicular to both these given lines are M1.N2,N1L2- N2L1 and L1M2-L2M1.
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If L1,M1,N1 and L2,M3,N2 be the direction Cosines of two mutually perpendicular lines , then show that direction Cosines of the line perpendicular to both these given lines are M1.N2,N1L2- N2L1 and L1M2-L2M1.
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