Q 2309434318.     What are the direction cosines of a line which is
equally inclined to the positive directions of the
axes?

NDA 2012 Paper 1 September
A

` (: 1/sqrt(3) , 1/sqrt(3) , 1/sqrt(3) :)`

B

` (: - 1/sqrt(3) , 1/sqrt(3) , 1/sqrt(3) :)`

C

` (: - 1/sqrt(3) , - 1/sqrt(3) , 1/sqrt(3) :)`

D

` (: 1/3 , 1/3 , 1/3 :)`

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