Andy5721 Andy5721
  • 23-01-2024
  • Mathematics
contestada

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

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