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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 3 · Q14
∫ (cos x)/(√(sin^2 x +1)) dx is equal to:
$\displaystyle \int \frac{\cos \mathrm{x}}{\sqrt{\sin ^{2} \mathrm{x}+1}} \mathrm{dx}$ is equal to :
Official answer
(C)
$\displaystyle \log \left|\sin \mathrm{x}+\sqrt{1+\sin ^{2} \mathrm{x}}\right|+\mathrm{C}$
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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.