Write the direction cosines of the line whose cartesian equations are 6x – 2 = 3y + 1 = 2z – 4.
We have
6x – 2 = 3y + 1 = 2z – 4
The equation of the given line can be re-written as,
The direction ratios of the line parallel to AB are proportional to → 1,2,3
The direction cosines of the line parallel to AB are proportional to →
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, 
, 
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1