如图,四棱锥
中,底面ABCD为矩形,侧面PAD为正三角形,且平面
平面ABCD,E为PD中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/0b4ae36f-cd9e-41dd-a2d2-c3b0cceb04ff.png?resizew=175)
(1)求证:平面
平面PCD;
(2)若二面角
的平面角大小
满足
,求线段AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/0b4ae36f-cd9e-41dd-a2d2-c3b0cceb04ff.png?resizew=175)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009bdd7f95dbfc97141b7c8b836dfa0.png)
20-21高三上·湖北荆州·阶段练习 查看更多[2]
湖北省荆州中学2020-2021学年高三上学期8月月考数学试题(已下线)专题1.4 《空间向量与立体几何》 单元测试(B卷提升篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教A版,浙江专用)
更新时间:2020-09-25 22:03:22
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相似题推荐
【推荐1】如图所示,在正方体
中,
分别为棱
,
的中点,且正方体的棱长为
.
![](https://img.xkw.com/dksih/QBM/2017/8/19/1755663796035584/1756245795217408/STEM/49f7226aeb98452fb9bca9ef0427bbad.png?resizew=233)
(1)求证:平面
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
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![](https://img.xkw.com/dksih/QBM/2017/8/19/1755663796035584/1756245795217408/STEM/49f7226aeb98452fb9bca9ef0427bbad.png?resizew=233)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec43f7352b3a8c194b4c37485fb4ffd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0cb774b7e17aaf31faa00741db2330.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddc8a83b5e5b7342e60400f9fcb46fc.png)
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【推荐2】在三棱柱ABC-A1B1C1中,AB⊥AC,B1C⊥平面ABC,E,F分别是AC,B1C的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4667e99b-b4fe-4dbb-90f0-f9161292e7bc.png?resizew=193)
(1)求证:EF∥平面AB1C1;
(2)求证:平面AB1C⊥平面ABB1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4667e99b-b4fe-4dbb-90f0-f9161292e7bc.png?resizew=193)
(1)求证:EF∥平面AB1C1;
(2)求证:平面AB1C⊥平面ABB1.
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解题方法
【推荐1】如图所示,
平面
,点
在以
为直径的
上,
,
,点
为线段
的中点,点
在弧
上,且
.
![](https://img.xkw.com/dksih/QBM/2018/2/3/1874601876807680/1876337078288384/STEM/31544b62f73a48f5a58d2d9b2c4b3552.png?resizew=166)
(1)求证:平面
平面
;
(2)求证:平面
平面
;
(3)设二面角
的大小为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca0b614cdcebac47b434db4aa75b518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60748993d43e143b211c1c38503a5b91.png)
![](https://img.xkw.com/dksih/QBM/2018/2/3/1874601876807680/1876337078288384/STEM/31544b62f73a48f5a58d2d9b2c4b3552.png?resizew=166)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cde51cc93dfd2c16f40ccc88107a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
(3)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f67b2e13c73c708d0e0c6134fcdca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
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解答题-证明题
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适中
(0.65)
解题方法
【推荐2】已知如图①,在菱形ABCD中,∠A=60°且AB=2,E为AD的中点,将△ABE沿BE折起使
,得到如图②所示的四棱锥A﹣BCDE,在四棱锥A﹣BCDE中,求解下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/39ae8908-1ae2-41cf-9ef1-94a45f8313ed.png?resizew=366)
(1)求证:BC⊥平面ABE;
(2)若P为AC的中点,求二面角P﹣BD﹣A的余弦值;
(3)求直线BC与平面ABD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/39ae8908-1ae2-41cf-9ef1-94a45f8313ed.png?resizew=366)
(1)求证:BC⊥平面ABE;
(2)若P为AC的中点,求二面角P﹣BD﹣A的余弦值;
(3)求直线BC与平面ABD所成角的正弦值.
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适中
(0.65)
名校
解题方法
【推荐1】如图,在四面体A-BCD中,AB⊥平面BCD,BC⊥CD,BC=2,∠CBD=
,E、F、Q分别为BC、BD、AB边的中点,P为AD边上任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/d4af287d-9e2d-4522-a3b7-9bfd785b4b2a.png?resizew=148)
(1)证明:CP
平面QEF.
(2)当二面角B-QF-E的平面角为
时,求AB的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/d4af287d-9e2d-4522-a3b7-9bfd785b4b2a.png?resizew=148)
(1)证明:CP
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)当二面角B-QF-E的平面角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
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解题方法
【推荐2】如图,在长方体
中,
,点
分别在棱
上,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/96a187dc-51d5-4d09-aa5e-a4479882bdfe.png?resizew=131)
(1)若点
分别为线段
的中点.求证:
四点共面;
(2)在线段
上是否存在一点
,使得平面
与平面
夹角的余弦值为
.若存在,试确定点
的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6ab71c3e2257b91efec052ad339226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ca00309261a540934d9b3ed9ba05b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b1d726cf581f600890723a3cf6cdb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8850b0c525a927cec788b1eadcda7925.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/96a187dc-51d5-4d09-aa5e-a4479882bdfe.png?resizew=131)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f0373b7f07be8dc6638eadfc2a4c512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e55fc0be2bcaebb02f2d016f84772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1321a80cec807b35fbf11f12d6a36818.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc3257f37be3274a38ec21b7ce9ebb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a8258659f872d81086322c3f85cb28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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