CBSE 2023 · Region 5 · Set 1 · Q8 · 1 mark
If $\displaystyle x=A \cos 4 t+B \sin 4 t$, then $\displaystyle \frac{d^{2} x}{d t^{2}}$ is equal to
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle -16 x$
Continuity and DifferentiabilitySecond Order DerivativeApplymcqeasy
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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.