如图,已知P为直角三角形ABC所在平面外一点,P在平面ABC上的射影O恰为斜边AC的中点,若PB=AB=1,BC=根号2求二面角P-AB-C的正切值
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![如图,已知P为直角三角形ABC所在平面外一点,P在平面ABC上的射影O恰为斜边AC的中点,若PB=AB=1,BC=根号2求二面角P-AB-C的正切值](/uploads/image/z/3851169-33-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5P%E4%B8%BA%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E6%89%80%E5%9C%A8%E5%B9%B3%E9%9D%A2%E5%A4%96%E4%B8%80%E7%82%B9%2CP%E5%9C%A8%E5%B9%B3%E9%9D%A2ABC%E4%B8%8A%E7%9A%84%E5%B0%84%E5%BD%B1O%E6%81%B0%E4%B8%BA%E6%96%9C%E8%BE%B9AC%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E8%8B%A5PB%3DAB%3D1%2CBC%3D%E6%A0%B9%E5%8F%B72%E6%B1%82%E4%BA%8C%E9%9D%A2%E8%A7%92P-AB-C%E7%9A%84%E6%AD%A3%E5%88%87%E5%80%BC)
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