2.连结PF,PE.过点P作PN⊥AB于N,PM⊥AC于M,
显然,S△BEP=S△BPC=S△PCF
S△BEP=1/2×BE×PN
S△PCF=1/2×CF×PM
∵P是角A平分线上一点
∴PM=PN
∴BE=CF