如图,已知AB是圆O的直径,BC为圆O的切线,切点为B,OC平行于弦AD(1)求证:DC是⊙O的切线;(2)过D点作DE⊥AB,交AC于P点,请考察P点在DE的什么位置?并说明理由.图在这里http://zhidao.baidu.com/question/32
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![如图,已知AB是圆O的直径,BC为圆O的切线,切点为B,OC平行于弦AD(1)求证:DC是⊙O的切线;(2)过D点作DE⊥AB,交AC于P点,请考察P点在DE的什么位置?并说明理由.图在这里http://zhidao.baidu.com/question/32](/uploads/image/z/2503471-31-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5AB%E6%98%AF%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%2CBC%E4%B8%BA%E5%9C%86O%E7%9A%84%E5%88%87%E7%BA%BF%2C%E5%88%87%E7%82%B9%E4%B8%BAB%2COC%E5%B9%B3%E8%A1%8C%E4%BA%8E%E5%BC%A6AD%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9ADC%E6%98%AF%E2%8A%99O%E7%9A%84%E5%88%87%E7%BA%BF%EF%BC%9B%EF%BC%882%EF%BC%89%E8%BF%87D%E7%82%B9%E4%BD%9CDE%E2%8A%A5AB%2C%E4%BA%A4AC%E4%BA%8EP%E7%82%B9%2C%E8%AF%B7%E8%80%83%E5%AF%9FP%E7%82%B9%E5%9C%A8DE%E7%9A%84%E4%BB%80%E4%B9%88%E4%BD%8D%E7%BD%AE%3F%E5%B9%B6%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1.%E5%9B%BE%E5%9C%A8%E8%BF%99%E9%87%8Chttp%3A%2F%2Fzhidao.baidu.com%2Fquestion%2F32)
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