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SSC CHSL 2023 PYQ — Question 58

SSC CHSL - 02 Aug 2023 - Shift 1 • Quantitative Aptitude • Q58

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If sinA + sin2 A = 1, then the value of the expression (cos2 A+ cos4 A) is __________

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Correct answer: B

Explanation

The correct answer is option 2 i.e. 1.

Given that

If sinA + sin2 A = 1

sinA = 1 - sin2 A = cos2 A

The value of the expression (cos2 A + cos4 A)

⇒ cos2 A + cos4 A

⇒ sin A + sin2 A

⇒ 1