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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 2 · Q10
If cos y=0, then what is the value of 1/2 cos y/2?
If $\displaystyle \cos y=0$, then what is the value of $\displaystyle \frac{1}{2} \cos \frac{y}{2}$ ?
Official answer
(D)
$\displaystyle \frac{1}{2 \sqrt{2}}$
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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.