在圆锥PO中,已知PO=根号2,⊙O的直径AB=2,C是⌒AB的中点在圆锥PO中,已知PO=根号2,圆O的直径AB=2,C是弧AB的中点,D是AC的中点(1)求证:面POD⊥面PAC(2)求二面角B-PA-C的余弦值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 11:05:31
![在圆锥PO中,已知PO=根号2,⊙O的直径AB=2,C是⌒AB的中点在圆锥PO中,已知PO=根号2,圆O的直径AB=2,C是弧AB的中点,D是AC的中点(1)求证:面POD⊥面PAC(2)求二面角B-PA-C的余弦值](/uploads/image/z/7962838-70-8.jpg?t=%E5%9C%A8%E5%9C%86%E9%94%A5PO%E4%B8%AD%2C%E5%B7%B2%E7%9F%A5PO%EF%BC%9D%E6%A0%B9%E5%8F%B72%2C%E2%8A%99O%E7%9A%84%E7%9B%B4%E5%BE%84AB%EF%BC%9D2%2CC%E6%98%AF%E2%8C%92AB%E7%9A%84%E4%B8%AD%E7%82%B9%E5%9C%A8%E5%9C%86%E9%94%A5PO%E4%B8%AD%2C%E5%B7%B2%E7%9F%A5PO%3D%E6%A0%B9%E5%8F%B72%2C%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84AB%3D2%2CC%E6%98%AF%E5%BC%A7AB%E7%9A%84%E4%B8%AD%E7%82%B9%2CD%E6%98%AFAC%E7%9A%84%E4%B8%AD%E7%82%B9%281%29%E6%B1%82%E8%AF%81%EF%BC%9A%E9%9D%A2POD%E2%8A%A5%E9%9D%A2PAC%282%29%E6%B1%82%E4%BA%8C%E9%9D%A2%E8%A7%92B-PA-C%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC)
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