Find the direction cosines of a line passing through the points ( -1, 0 , 2) and (3, 4, 6 - Maths - Three Dimensional Geometry

Question

Find the direction cosines of a line passing through the points (
-1, 0 , 2) and (3, 4, 6 )

Akhil Goyal · Accepted Answer

Let P≡( -1, 0 , 2) , Q≡(3, 4, 6 )Direction ratios of the line segment joining=3-(-1),4-0,6-2=4,4,4So, we need find direction cosines l,m,nl=442+42+22=436=23m=442+42+22=436=23n=442+42+22=436=46 =23

Find the direction cosines of a line passing through the points ( -1, 0 , 2) and (3, 4, 6 )