CBSE 2023 · Region 4 · Set 1 · Q13 · 1 mark
If $\displaystyle \theta$ is the angle between two vectors $\displaystyle \vec{a}$ and $\displaystyle \vec{b}$, then $\displaystyle \vec{a} \cdot \vec{b} \geq 0$ only when :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 0 \leq \theta \leq \frac{\pi}{2}$
Vector AlgebraProduct of Two VectorsUnderstandmcqeasy
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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.