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[几何] 线面角最大

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guanmo1 posted 2017-5-13 21:24 |Read mode

线面角最大.png

线面角最大.png

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色k posted 2017-5-13 22:19

答案显然就是 AE 和 CD 所成角的正弦值。
非要说理由的话，将 AE 平移到 C 处就知道了。

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2025-7-15 15:18 GMT+8

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