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下面有一道较复杂的二面角问题,本文将从不同的角度对其解法进行探索,进一步提高学生的解题能力和创新能力. 例在四棱锥P-ABCD是矩形,PA⊥平面
Below there is a more complex dihedral problem. This article will explore its solution from different perspectives to further improve the students’ problem-solving abilities and innovative abilities. Example In a quadrangular pyramid P-ABCD is a rectangle, PA ⊥ plane