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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 4 · Set 2 · Q1
Which of the following is true for all values of $\displaystyle \theta\left(0^{\circ} \leq \theta \leq 90^{\circ}\right)$ ?
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle \sec ^{2} \theta-\tan ^{2} \theta=1$
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CBSE Class 10 Mathematics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.