Inclination $\theta$ of a line lies in the range:
A$0° \leq \theta < 180°$
B$0° < \theta < 90°$
C$-90° < \theta < 90°$
D$0° \leq \theta \leq 360°$
Answer & Solution
Correct answer: A. $0° \leq \theta < 180°$
Inclination is measured anti-clockwise from positive x-axis: $0° \leq \theta < 180°$.
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