CBSE 2023 · Region 3 · Set 2 · Q6 · 1 mark
The direction cosines of vector $\displaystyle \overrightarrow{\mathrm{BA}}$, where coordinates of A and B are $\displaystyle (1,2,-1)$ and ( $\displaystyle 3,4,0$ ) respectively, are :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle -\frac{2}{3},-\frac{2}{3},-\frac{1}{3}$
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.