CBSE 2026 · Region 3 · Set 3 · Q5 · 1 mark
The domain of $\displaystyle \cos ^{-1}(4 \mathrm{x}+1)$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \left[-\frac{1}{2}, 0\right]$
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CBSE Class 12 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.