Straight Line Question 245
Question: The diagonals of the parallelogram whose sides are $ lx+my+n=0, $ $ lx+my+n’=0 $ , $ mx+1y+n=0 $ and $ mx+ly+n’=0 $ include an angle
Options:
A) $ \frac{\pi }{3} $
B) $ \frac{\pi }{2} $
C) $ {{\tan }^{-1}}( \frac{1^{2}-m^{2}}{1^{2}+m^{2}} ) $
D) $ {{\tan }^{-1}}( \frac{2lm}{1^{2}+m^{2}} ) $
Correct Answer: B
Show Answer
Answer:
Solution:
BETA
