如图,四棱锥P-ABCD的底面是正方形,PD⊥底面ABCD,且E在棱PB上(设空间向量)(1)求证:平面AEC⊥平面PDB(法向量 方法)(2) 当PD=√(根号)2AB且E为PB的中点时,求AE与平面PDB所成的角的大小(设
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![如图,四棱锥P-ABCD的底面是正方形,PD⊥底面ABCD,且E在棱PB上(设空间向量)(1)求证:平面AEC⊥平面PDB(法向量 方法)(2) 当PD=√(根号)2AB且E为PB的中点时,求AE与平面PDB所成的角的大小(设](/uploads/image/z/3687041-65-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9B%9B%E6%A3%B1%E9%94%A5P-ABCD%E7%9A%84%E5%BA%95%E9%9D%A2%E6%98%AF%E6%AD%A3%E6%96%B9%E5%BD%A2%2CPD%E2%8A%A5%E5%BA%95%E9%9D%A2ABCD%2C%E4%B8%94E%E5%9C%A8%E6%A3%B1PB%E4%B8%8A%EF%BC%88%E8%AE%BE%E7%A9%BA%E9%97%B4%E5%90%91%E9%87%8F%EF%BC%89%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9A%E5%B9%B3%E9%9D%A2AEC%E2%8A%A5%E5%B9%B3%E9%9D%A2PDB%EF%BC%88%E6%B3%95%E5%90%91%E9%87%8F+%E6%96%B9%E6%B3%95%EF%BC%89%282%29+%E5%BD%93PD%3D%E2%88%9A%EF%BC%88%E6%A0%B9%E5%8F%B7%EF%BC%892AB%E4%B8%94E%E4%B8%BAPB%E7%9A%84%E4%B8%AD%E7%82%B9%E6%97%B6%2C%E6%B1%82AE%E4%B8%8E%E5%B9%B3%E9%9D%A2PDB%E6%89%80%E6%88%90%E7%9A%84%E8%A7%92%E7%9A%84%E5%A4%A7%E5%B0%8F%EF%BC%88%E8%AE%BE)
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