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Direction cosines of line joining (1,2,3), (3,6,7):
A2/3, 4/3, 4/3
B1/6, 2/6, 3/6
C1/3, 2/3, 2/3
D2/9, 4/9, 4/9
Answer & Solution
Correct answer: C. 1/3, 2/3, 2/3
The differences are 2, 4, 4 and the distance is 6, giving 1/3, 2/3, 2/3.
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