The angle between the lines 
and, 
is
We have,
The direction ratios of the given lines are proportional to 1,1,2 and 
-1, 
-1, 4.
The given lines are parallel to the vectors
→ 
and 
Let θ be the angle between the given lines.
Now,
→ θ 
1
The angle between the lines and, is
We have,
The direction ratios of the given lines are proportional to 1,1,2 and -1, -1, 4.
The given lines are parallel to the vectors
→ and
Let θ be the angle between the given lines.
Now,
→ θ