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The number of solutions of the equation sin 2x + 2sin x − cos x − 1 = 0 in the range 0 ≤ x ≤ 2π is

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The number of solutions of the equation sin 2x + 2sin x − cos x − 1 = 0 in the range 0 ≤ x ≤ 2π is

(A) 3

(B) 4

(C) 2

(D) None of these

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1 Answer

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Best answer

Correct option: (A) 3

Explanation:

Consider, sin 2x + 2sin x − cos x − 1 = 0

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