CBSE 2025 · Region 2 · Set 2 · Q1 · 1 mark
The values of $\displaystyle x$ for which the angle between the vectors $\displaystyle \overrightarrow{\mathrm{a}}=2 x^{2} \hat{\mathrm{i}}+4 x \hat{\mathrm{j}}+\hat{\mathrm{k}}$ and $\displaystyle \vec{b}=7 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}+x \hat{\mathrm{k}}$ is obtuse, is:
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle \left(0, \frac{1}{2}\right)$
Vector AlgebraProduct of Two VectorsApplymcqmedium
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.