CBSE 2023 · Region 4 · Set 1 · Q17 · 1 mark
If the direction cosines of a line are $\displaystyle \left(\frac{1}{\mathrm{a}}, \frac{1}{\mathrm{a}}, \frac{1}{\mathrm{a}}\right)$, then :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \mathrm{a}= \pm \sqrt{3}$
Three Dimensional GeometryDirection Cosines and Direction Ratios of a LineApplymcqeasy
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CBSE Class 12 Mathematics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.