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MCQ
The angle between the lines y = 2x + 1 and y = x - 3 is approximately:
Unit-8 Geometry of Straight Lines
A 45 degrees
B 18.4 degrees
C 30 degrees
D 90 degrees
Explanation

tan θ = |(m1 - m2)/(1 + m1*m2)| = |(2 - 1)/(1 + 2)| = 1/3, so θ ≈ 18.4 degrees.

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