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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 2 · Q5
The principal value of sin^-1( cos (43 π)/5) is
The principal value of $\displaystyle \sin ^{-1}\left(\cos \frac{43 \pi}{5}\right)$ is
Official answer
(B)
$\displaystyle \frac{-\pi}{10}$
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CBSE Class 12 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.