Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If 
and 
are d.c.’s of two lines inclined to each other at an angle θ θ , then the d.c.’s of the internal bisectors of angle between these lines are
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Let OA and OB be two lines.
D.c.’s of OA is 
and OB is 
.
Let OA = OB = 1.
Then the co-ordinates of A and B are 
and 
.
Let OC be the bisector of ∠ ∠ AOB .
Then C is the mid-point of AB and so its co-ordinates are 
.
∴ ∴ D.r.’s of line OC are 
We have,
.
D.r.’s of line OC are 
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