如图 已知ab是圆o的直径 点c d在圆o上,过点C的直线与AB的延长线交于点P,AC=PC,∠COB=2∠PCB.(1)求证:PC是圆O的切线;(2)求∠P的度数;(3)点M是弧AB的中点,CM交AB于点N,AB=4,求线段BM、CM及弧BC
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![如图 已知ab是圆o的直径 点c d在圆o上,过点C的直线与AB的延长线交于点P,AC=PC,∠COB=2∠PCB.(1)求证:PC是圆O的切线;(2)求∠P的度数;(3)点M是弧AB的中点,CM交AB于点N,AB=4,求线段BM、CM及弧BC](/uploads/image/z/13009411-19-1.jpg?t=%E5%A6%82%E5%9B%BE+%E5%B7%B2%E7%9F%A5ab%E6%98%AF%E5%9C%86o%E7%9A%84%E7%9B%B4%E5%BE%84+%E7%82%B9c+d%E5%9C%A8%E5%9C%86o%E4%B8%8A%2C%E8%BF%87%E7%82%B9C%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%B8%8EAB%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%A4%E4%BA%8E%E7%82%B9P%2CAC%3DPC%2C%E2%88%A0COB%3D2%E2%88%A0PCB.%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9APC%E6%98%AF%E5%9C%86O%E7%9A%84%E5%88%87%E7%BA%BF%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82%E2%88%A0P%E7%9A%84%E5%BA%A6%E6%95%B0%EF%BC%9B%EF%BC%883%EF%BC%89%E7%82%B9M%E6%98%AF%E5%BC%A7AB%E7%9A%84%E4%B8%AD%E7%82%B9%2CCM%E4%BA%A4AB%E4%BA%8E%E7%82%B9N%2CAB%3D4%2C%E6%B1%82%E7%BA%BF%E6%AE%B5BM%E3%80%81CM%E5%8F%8A%E5%BC%A7BC)
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