CBSE 2023 · Region 5 · Set 1 · Q15 · 1 mark
If a line makes angles of $\displaystyle 90^{\circ}, 135^{\circ}$ and $\displaystyle 45^{\circ}$ with the $\displaystyle x, \mathrm{y}$ and z axes respectively, then its direction cosines are
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle 0,-\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}$
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.