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SSC CGL 2022 PYQ — Question 53

SSC CGL - 05 Dec 2022 - Shift 3 • Quantitative Aptitude • Q53

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cot2A - cos2A is equal to:

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Correct answer: B

Explanation

The correct answer is option 2 i.e. cos2A. cot2A.

⇒ cot2A - cos2A

⇒ cos2A/sin2A - cos2A

⇒ cos2A((1 - cos2A)/sin2A) 

⇒ cos2A(cos2A/sin2A)

⇒ cos2A.cot2A