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Moutamadris.ma...2 + 2sin2x cos2x 2+2 1 - cos 4 - 2cos2x cos2x I + tan2x 1 + tan2x 2 + 2tan2x - 1 1 + P (x) + 2tan2x) 2 1 + 2tan2Z) 1 + 2tan2Z 20 + 2 x 10 14 tanx = tan x = - tan x

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