Test Academy | The function f(x) = 4 sin³ x – 6 sin²x + 12 sin x + 100 is strictly increasing in (π, 3π/2), decreasing in (π/2, π), decreasing in [−π/2,π/2], decreasing in [0, π/2]

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The function f(x) = 4 sin³ x – 6 sin²x + 12 sin x + 100 is strictly

Options :

increasing in (π, 3π/2)
decreasing in (π/2, π)
decreasing in [−π/2,π/2]
decreasing in [0, π/2]

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