如图ABCD是正方形,O是正方形的中心,PO⊥底面ABCD,E是PC的中点,求 若po=1,AB=2,则异面直线OE与AD所成角的余弦值求 若po=1,AB=2,则异面直线OE与AD所成角的余弦值
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![如图ABCD是正方形,O是正方形的中心,PO⊥底面ABCD,E是PC的中点,求 若po=1,AB=2,则异面直线OE与AD所成角的余弦值求 若po=1,AB=2,则异面直线OE与AD所成角的余弦值](/uploads/image/z/6766869-21-9.jpg?t=%E5%A6%82%E5%9B%BEABCD%E6%98%AF%E6%AD%A3%E6%96%B9%E5%BD%A2%2CO%E6%98%AF%E6%AD%A3%E6%96%B9%E5%BD%A2%E7%9A%84%E4%B8%AD%E5%BF%83%2CPO%E2%8A%A5%E5%BA%95%E9%9D%A2ABCD%2CE%E6%98%AFPC%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E6%B1%82+%E8%8B%A5po%3D1%2CAB%3D2%2C%E5%88%99%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BFOE%E4%B8%8EAD%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC%E6%B1%82+%E8%8B%A5po%3D1%EF%BC%8CAB%3D2%EF%BC%8C%E5%88%99%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BFOE%E4%B8%8EAD%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC)
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