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Chapter 11 Class 12 Three Dimensional Geometry | 5 questions | about 4 minutes

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Question 1 of 5
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Question 1 of 5
CBSE Board Exam 2025
If a line makes angles of \(\frac{3 \pi}{4}, \frac{\pi}{3}\) and \(\theta\) with the positive directions of \(x, y\) and z -axis respectively, then \(\theta\) is
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Question 2 of 5
CBSE Board Exam 2026
Assertion (A) : A line can have direction cosines \(\langle 1,1,1\rangle\)
Reason (R) : \(\cos \theta=1\) is possible for \(\theta=0\).
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Question 3 of 5
CBSE Board Exam 2024
If \(\alpha, \beta\) and \(\gamma\) are the angles which a line makes with positive directions of \(\mathrm{x}, \mathrm{y}\) and z axes respectively, then which of the following is not true ?
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Question 4 of 5
CBSE Board Exam 2026
Direction ratios of lines \(l_{1}\) and \(l_{2}\) respectively are \(<1,-2,3>\) and \(<-2, \mathrm{p},-6>\). The value of p for which \(l_{1} \| l_{2}\), is:
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Question 5 of 5
CBSE Board Exam 2026
If \(l_{1}, \mathrm{~m}_{1}, \mathrm{n}_{1}\) and \(l_{2}, \mathrm{~m}_{2}, \mathrm{n}_{2}\) are direction cosines of lines \(\mathrm{L}_{1}\) and \(\mathrm{L}_{2}\) respectively and \(\theta\) is the acute angle between them, then :
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