Réponses

Meilleure réponse !
2013-03-25T15:55:57+01:00

sin 4x = sin 2x <=> 4x = 2x + k2pi    ou 4x = pi - 2x + k2pi

                               2x = k2pi                  6x = k2pi

                               x = kpi (2 sol)              x = kpi/3 (6sol)