CBSE 2026 · Region 4 · Set 1 · Q3 · 1 mark
The principal value of $\displaystyle \sec ^{-1}(\sqrt{2})+2 \operatorname{cosec}^{-1}(-\sqrt{2})$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle -\frac{\pi}{4}$
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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.