Straight Line Question 19
Question: The angle between the lines $ 2x-y+3=0 $ and $ x+2y+3=0 $ is [Kerala (Engg.) 2002]
Options:
A) $ 90^{o} $
B) $ 60^{o} $
C) $ 45^{o} $
D) $ 30^{o} $
Correct Answer: A $ \therefore m_1m_2=-1 $ . So the lines are perpendicular i.e., $ \theta =90{}^\circ $ .Show Answer
Answer:
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