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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 5 · Set 1 · Q3
For the inverse trigonometric functions, which of the following Principal Value Branch is not correctly defined?
For the inverse trigonometric functions, which of the following Principal Value Branch is not correctly defined ?
Official answer
(D)
$\displaystyle \operatorname{cosec}^{-1}: \mathrm{R}-(-1,1) \rightarrow\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]$
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CBSE Class 12 Mathematics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.