The inclination of a line may be described as acute or:
AObsolete
BObserved
CObtuse
DObscure
Answer & Solution
Correct answer: C. Obtuse
1. Inclination runs from zero to one hundred and eighty degrees.
2. That range covers angles on both sides of a right angle.
3. The inclination of the line may be acute or obtuse.
4. The slope is positive in one case and negative in the other.
_Source: NCERT Class XI Mathematics, Ch 9 'Straight Lines'_
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