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Find all real x in the interval [0, 2pi) [Slovenia 2010]

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November 16, 2010
trigonometryalgebra proposedalgebra

Problem Statement

Find all real xx in the interval [0,2π)[0, 2\pi) such that 2733sinx=9cos2x.27 \cdot 3^{3 \sin x} = 9^{\cos^2 x}.