Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let the direction cosines of two lines satisfy the equations: 
and 
. Then the cosine of the acute angle between these lines is :
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
From 
, substitute in 
:
. Let 
.
, giving 
or 
.
: direction 
.
: direction 
.
.
──────────────────────────────────────────────────────────────────────────────────────────
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Let the line pass through the point and make equal angles with the positive coordinate axes. If t…
Let the line be parallel to the vector and pass through the point , and the line be parallel to…
The vertices B and C of a triangle ABC lie on the line . The coordinates of A and B are and resp…
Let be the image of the point in the line . Then the distance of Q from the line is
If the distance of the point , from the line along a line with direction ratios is , then is e…
The sum of all values of , for which the shortest distance between the lines and is , is