已知四棱锥P-ABCD的底面ABCD是边长为2的正方形,PD⊥底面ABCD,E,F分别为已知四棱锥P-ABCD的底面ABCD是边长为2的正方形,PD⊥底面ABCD,F分别为棱BC,AD的中点,已知二面角P-BF-C的余弦值为√6/6求四
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![已知四棱锥P-ABCD的底面ABCD是边长为2的正方形,PD⊥底面ABCD,E,F分别为已知四棱锥P-ABCD的底面ABCD是边长为2的正方形,PD⊥底面ABCD,F分别为棱BC,AD的中点,已知二面角P-BF-C的余弦值为√6/6求四](/uploads/image/z/15205174-70-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9B%9B%E6%A3%B1%E9%94%A5P-ABCD%E7%9A%84%E5%BA%95%E9%9D%A2ABCD%E6%98%AF%E8%BE%B9%E9%95%BF%E4%B8%BA2%E7%9A%84%E6%AD%A3%E6%96%B9%E5%BD%A2%2CPD%E2%8A%A5%E5%BA%95%E9%9D%A2ABCD%2CE%2CF%E5%88%86%E5%88%AB%E4%B8%BA%E5%B7%B2%E7%9F%A5%E5%9B%9B%E6%A3%B1%E9%94%A5P-ABCD%E7%9A%84%E5%BA%95%E9%9D%A2ABCD%E6%98%AF%E8%BE%B9%E9%95%BF%E4%B8%BA2%E7%9A%84%E6%AD%A3%E6%96%B9%E5%BD%A2%EF%BC%8CPD%E2%8A%A5%E5%BA%95%E9%9D%A2ABCD%EF%BC%8CF%E5%88%86%E5%88%AB%E4%B8%BA%E6%A3%B1BC%EF%BC%8CAD%E7%9A%84%E4%B8%AD%E7%82%B9%EF%BC%8C%E5%B7%B2%E7%9F%A5%E4%BA%8C%E9%9D%A2%E8%A7%92P-BF-C%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC%E4%B8%BA%E2%88%9A6%2F6%E6%B1%82%E5%9B%9B)
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