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Mathematics · 2024 · 1 mark
CBSE 2024 · Region 2 · Set 1 · Q19
Assertion (A) : If $\displaystyle \sin \mathrm{A}=\frac{1}{3}\left(0^{\circ}<\mathrm{A}<90^{\circ}\right)$, then the value of $\displaystyle \cos \mathrm{A}$ is $\displaystyle \frac{2 \sqrt{2}}{3}$
Reason (R) : For every angle $\displaystyle \theta, \sin ^{2} \theta+\cos ^{2} \theta=1$.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true. Reason (R) is the correct explanation of Assertion (A).
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CBSE Class 10 Mathematics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.