如图,在底面为矩形的四棱锥P-ABCD中,
底面ABCD.
(1)证明:平面
平面PBC.
(2)若AB=3,AD=5,E为侧棱PB上一点,且BE=2PE,若CE与底面ABCD所成的角大于60°,求PA的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/30c19161-bc42-4fa6-91f3-5c75a01422a0.png?resizew=153)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
(2)若AB=3,AD=5,E为侧棱PB上一点,且BE=2PE,若CE与底面ABCD所成的角大于60°,求PA的取值范围.
22-23高一下·青海海东·阶段练习 查看更多[2]
更新时间:2023-08-10 13:45:34
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解答题-证明题
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适中
(0.65)
解题方法
【推荐1】在如图所示的几何体中,
平面
,
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,且
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是
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/3366c567-6ffb-4d70-b2d3-c162224bfc9e.png?resizew=150)
(1)求证:
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(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548f63fb81113972aed5859740976fc.png)
(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e51817ee1ebf17c73ed21171bcfc5b5.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
解题方法
【推荐2】四棱锥P-ABCD中,PA⊥平面ABCD,四边形ABCD为菱形,∠ADC=60°,PA=AD=2,E为AD的中点.
![](https://img.xkw.com/dksih/QBM/2020/8/28/2537770432323584/2543246176026624/STEM/4e854418-8754-4227-a1f2-c2040042fde9.png?resizew=247)
(1)求证:平面PCE⊥平面PAD;
(2)求PC与平面PAD所成的角的正切值;
(3)求二面角A-PD-C的正弦值.
![](https://img.xkw.com/dksih/QBM/2020/8/28/2537770432323584/2543246176026624/STEM/4e854418-8754-4227-a1f2-c2040042fde9.png?resizew=247)
(1)求证:平面PCE⊥平面PAD;
(2)求PC与平面PAD所成的角的正切值;
(3)求二面角A-PD-C的正弦值.
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
解题方法
【推荐1】如图,在五面体
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![](https://img.xkw.com/dksih/QBM/2022/4/23/2964523223416832/2966380836585472/STEM/cd0ad8ae1549422bbfc9159d7b5922bd.png?resizew=163)
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(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445b51117626fbd3373e32acc514c64b.png)
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解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】四棱锥
中,
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是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/2585f887-45df-4e9c-a89a-399d38013234.png?resizew=207)
(1)求证:平面
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;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c800b6aabdc453e2c7e343061e9c6a78.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea440fcc8f186f5de9105b18e152152.png)
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您最近一年使用:0次