Photos 2SIN Π X

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2sin π x. 3tg2𝑥 − 5 cos 𝑥 + 1 = 0.. Cos 1/2x+0.5. 3 Sin 2 x -cos x +1 0. Cos2x+sin2x+1 0.
3tg2𝑥 − 5 cos 𝑥 + 1 = 0.. Cos 1/2x+0.5. 3 Sin 2 x -cos x +1 0. Cos2x+sin2x+1 0.

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