如图,AB是圆O的直径,弦CD垂直AB于点E,过点B作圆O的切线,交AC的延长线于点F已知OA=4,AE=2,求:(1)C如图
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![如图,AB是圆O的直径,弦CD垂直AB于点E,过点B作圆O的切线,交AC的延长线于点F已知OA=4,AE=2,求:(1)C如图](/uploads/image/z/3719552-32-2.jpg?t=%E5%A6%82%E5%9B%BE%2CAB%E6%98%AF%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%2C%E5%BC%A6CD%E5%9E%82%E7%9B%B4AB%E4%BA%8E%E7%82%B9E%2C%E8%BF%87%E7%82%B9B%E4%BD%9C%E5%9C%86O%E7%9A%84%E5%88%87%E7%BA%BF%2C%E4%BA%A4AC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8E%E7%82%B9F%E5%B7%B2%E7%9F%A5OA%3D4%2CAE%3D2%2C%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89C%E5%A6%82%E5%9B%BE)
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