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The direction cosines of a line with direction ratios 6, 2, 3 are
A6/7, 2/7, 3/7
B6/11, 2/11, 3/11
C6/5, 2/5, 3/5
D3/7, 2/7, 6/7
Answer & Solution
Correct answer: A. 6/7, 2/7, 3/7
36 + 4 + 9 = 49, whose root is 7, so the cosines are 6/7, 2/7, 3/7.
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