Three Dimensional Geometry Question 209
Question: Direction ratios of two lines are a, b, c and $ \frac{1}{bc},\frac{1}{ca},\frac{1}{ab} $ . The lines are
Options:
A) Mutually perpendicular
B) Parallel
C) Coincident
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
As $ \frac{a}{(1/bc)}=\frac{b}{(1/ca)}=\frac{c}{(1/ab)}, $ Hence lines are parallel.
BETA
