如图,圆O直径AB=4,C为圆周上一点,AC=2,过C作圆O切线L,过B作L垂线BD,D为垂点,BD交圆O于E 1,求角AEC1,求角AEC2,求证:四边形OBEC是菱形
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![如图,圆O直径AB=4,C为圆周上一点,AC=2,过C作圆O切线L,过B作L垂线BD,D为垂点,BD交圆O于E 1,求角AEC1,求角AEC2,求证:四边形OBEC是菱形](/uploads/image/z/9918060-60-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%86O%E7%9B%B4%E5%BE%84AB%3D4%2CC%E4%B8%BA%E5%9C%86%E5%91%A8%E4%B8%8A%E4%B8%80%E7%82%B9%2CAC%3D2%2C%E8%BF%87C%E4%BD%9C%E5%9C%86O%E5%88%87%E7%BA%BFL%2C%E8%BF%87B%E4%BD%9CL%E5%9E%82%E7%BA%BFBD%2CD%E4%B8%BA%E5%9E%82%E7%82%B9%2CBD%E4%BA%A4%E5%9C%86O%E4%BA%8EE+1%2C%E6%B1%82%E8%A7%92AEC1%2C%E6%B1%82%E8%A7%92AEC2%2C%E6%B1%82%E8%AF%81%EF%BC%9A%E5%9B%9B%E8%BE%B9%E5%BD%A2OBEC%E6%98%AF%E8%8F%B1%E5%BD%A2)
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