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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 1 · Q9
Given that sin θ=a/b, then cos θ is equal to:
Given that $\displaystyle \sin \theta=\frac{a}{b}$, then $\displaystyle \cos \theta$ is equal to :
Official answer
(C)
$\displaystyle \frac{\sqrt{b^{2}-a^{2}}}{b}$
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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.