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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 5 · Set 3 · Q19
Assertion (A): For an acute angle θ, value of cosec θ cannot be 1/(√ 2). Reason (R): cosec θ ≥ 1 for 0^° ≤ θ ≤ 90^°
Assertion (A) : For an acute angle $\displaystyle \theta$, value of $\displaystyle \operatorname{cosec} \theta$ cannot be $\displaystyle \frac{1}{\sqrt{2}}$.
Reason (R) : $\displaystyle \operatorname{cosec} \theta \geq 1$ for $\displaystyle 0^{\circ} \leq \theta \leq 90^{\circ}$
Official answer
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
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CBSE Class 10 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.