The direction ratios of a line are 2, 6, -9. What are its direction cosines?

Given : A line has direction ratios 2, 6 , -9

To find : Direction cosines of the line

Formula used : If (l,m,n) are the direction ratios of a given line then direction cosines are given by , ,

Here l = 2 , m = 6 , n = -9

Direction cosines of the line with direction ratios 2, 6 , -9 is

, ,

= , , = , ,

= , ,

Direction cosines of the line with direction ratios 2, 6, -9 is , ,