CBSE 2025 · Region 5 · Set 3 · Q19 · 1 mark
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
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Introduction to TrigonometryTrigonometric RatiosUnderstandassertion_reasonmedium
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CBSE Class 10 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.