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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 1 · Q10
If cos A =1/2, then the value of sin^2 A +2 cos^2 A is:
If $\displaystyle \cos \mathrm{A}=\frac{1}{2}$, then the value of $\displaystyle \sin ^{2} \mathrm{~A}+2 \cos ^{2} \mathrm{~A}$ is :
Official answer
(B)
$\displaystyle \frac{5}{4}$
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CBSE Class 10 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.