解:∠ABC=∠ACB,∠1=∠2 故:∠PCB=∠PBA,设∠PCB为X,则有等式:2X+2∠1(或∠2)=(180-38)解得:X+∠1=31.5°又因X+∠1+∠BPC=180°则∠BPC=180°-31.5°=148.5°