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प्रश्न
The slope of a vertical line is ______.
विकल्प
0
1
90
not defined
MCQ
रिक्त स्थान भरें
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उत्तर
The slope of a vertical line is not defined.
Explanation:
A vertical line is parallel to the y-axis, so its inclination is 90°. Since $$\tan 90^{\circ}$$ is undefined, the slope of a vertical line is not defined.
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