∵四边形ABCD是平行四边形,∴∠BAD=∠DCB,AB=CD,AD=BC,∵△ACP和△ACQ都是等边三角形∴AP=CQ,CP=AQ,∠PAC=∠ACQ=60°,∴∠BAP=∠DCQ,∴△ABP≌△CDQ,∴BP=DQ,又因为AD=BC,CP=AQ,∴△BPC≌△DQA,∴∠DAQ=∠BCP,∵∠BA...