Answer :
Given : A line 
To find : Direction cosines of the line
Formula used : If a line is given by 
= 
= 
then direction cosines are given by 
, 
, 
The line is 
= 
= 
Here l = -2 , m = 6 , n = -3
Direction cosines of the line 
= 
= 
is
, 
, 
= 
, 
, 
= 
, 
, 
= 
, 
, 
Direction cosines of the line 
= 
= 
is 
, 
, 
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