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SSC CGL 2025 PYQ — Question 51

SSC CGL - 12 Sep 2025 - Shift 2 • Quantitative Aptitude • Q51

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If sec⁡A=125\sec A=\frac{12}{5} and A is acute, find cos2A.

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Correct answer: B

Explanation

The correct answer is option 2 i.e. 2514425\over144.

cos A = 1/sec A

⇒ cos A = 1/(12/5) = 5/12

⇒ cos2A = (5/12)2 = 25/144