MalaucÃ ne is a commune of 2,669 people ( 2008 ) . It is located in the region Provence-Alpes-C Ã te d'Azur in the Vaucluse department in the south of France . MalaucÃ ne is a commune in the Vaucluse department in the Provence-Alpes-C Ã te d'Azur region in southeastern France .