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in Three Dimensional Geometry by (48.0k points)

Direction cosines of 3i be 

(a) 3,0,0 

(b) 1,0,0 

(c) -1, 0,0 

(d) -3,0,0

1 Answer

+1 vote
by (46.3k points)
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Best answer

Answer is (b)

Given vector

whose direction ratio’s are 3, 0, 0.

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