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CGP EDU Academic Team
Published on: August 13, 2026
Let ABCD is parallelogram where A = (1,2,4) , B = (8,7,9) and D = (6,1,5) . Find direction cosines of line AC
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Sol. Mid point of BD is M (7,4,7)
Direction ratio of AM is (6,2,3)
direction cosines of AC is 
or 
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