25.如圖,點(diǎn)A(-10,0),B(-6,0),點(diǎn)C在y軸的正半軸上,∠CBO=45°,CD∥AB,∠CDA=90°.點(diǎn)P從點(diǎn)Q(8,0)出發(fā),沿x軸向左以每秒1個(gè)單位長的速度向點(diǎn)A勻速運(yùn)動(dòng),運(yùn)動(dòng)時(shí)間為t秒.
(1)求點(diǎn)C的坐標(biāo).
(2)當(dāng)∠BCP=15°時(shí),求t的值.
(3)以PC為直徑作圓,當(dāng)該圓與四邊形ABCD的邊(或邊所在的直線)相切時(shí),求t的值.