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如图,AC为圆O的直径,AP⊥圆O,PA=AB=BC. (1)证明:面PAB⊥面PBC; (2)若M、N分别为线段PB、PC的中点,试求直线PC与平面AMN所成角的正弦值.
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高三上学期数学《2010-2011学年浙江省温州市十校联合体高三(上)期末数学试卷(文科)1》真题及答案
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