1.

If Lines OA,OB are drawn from O(origin) with direction cosines proportional to (1,−2,−1),(3,−2,3). Then the direction cosines of the normal to the plane AOB is

Answer»

If Lines OA,OB are drawn from O(origin) with direction cosines proportional to (1,2,1),(3,2,3). Then the direction cosines of the normal to the plane AOB is



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