فضاء التلاميذ والأساتذة والطلبة

Moutamadris.ma sin6x + cos6x - 2sin4x - cos x + sin x — 2(cos x + sin6x) - 3(cos4x 4 sin x) sin8x + cosgx + 6sin x . cos4x + 4sin2x cos2x (sin4x + cos4x) ................
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