If sin x + sin 2 x = 1, then cos 4 x + cos 2 x is equal to:

If sin x + sin2 x = 1,... - Solved

2 x = 1, then cos⁴ x + cos² x is..." - Step-by-step solution, answer key, and detailed explanation on MCA Prep."> 2 x = 1, then cos⁴ x + cos² x is..." - Step-by-step solution, answer key, and detailed explanation on MCA Prep." /> 2 x = 1, then cos⁴ x + cos² x is..." - Step-by-step solution, answer key, and detailed explanation on MCA Prep." />

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Question 47

Mathematics Trigonometric Equations Hard

If sin x + sin2 x = 1, then cos4 x + cos2 x is equal to:

(A) 0

(B) 1

(C) -1

(D) 2

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Correct Solution: Option B

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