∵ACB=90,
AB为△ABC的外接圆的直径,
BO=AB/2=5cm,
连接OP,
∵P为BC中点,
PO=AC/2=3cm,
∵点P在⊙O内部,
⊙P与⊙O只能内切,
5-2t=3,或2t-5=3,
t=1或4,
⊙P与⊙O相切时,t的值为1或4.
∵ACB=90,
AB为△ABC的外接圆的直径,
BO=AB/2=5cm,
连接OP,
∵P为BC中点,
PO=AC/2=3cm,
∵点P在⊙O内部,
⊙P与⊙O只能内切,
5-2t=3,或2t-5=3,
t=1或4,
⊙P与⊙O相切时,t的值为1或4.