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= cos2x + sin2x + 2 sin s cosx - 1 = 1 +2 sin x. cosx-l 2 sin x cos x cos2 - cos2x . sin2x = cos2x (1 - sin2x) — cos2x . cos2x C(x) = cos4x (2cos x + sin + (cos x -2sin D(x) = = 4cos2x + sin2x + x . sin X + cos2x + 4sin2 x - x cos x = 5cos2x + 5 sin2x — 5(cos2x + sin2x) E(x) = cos5x + cos3x . sin2x = cos3 (cos2x + sin2x) — cos3x . 1 F(x) = O ................
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