如图,在四棱锥
中,
底面ABCD,四边形ABCD是正方形,且
,E是棱BC上的动点,F是线段PE的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/b82f1a55-0502-4232-a5ec-482c441a4579.png?resizew=178)
(1)求证:
平面ADF;
(2)是否存在点E,使得平面DEP与平面ADF所成角的余弦值为
?若存在,请求出线段BE的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/b82f1a55-0502-4232-a5ec-482c441a4579.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
(2)是否存在点E,使得平面DEP与平面ADF所成角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
22-23高二上·湖北·期末 查看更多[3]
湖北省部分地区2022-2023学年高二上学期元月期末数学试题(已下线)模块四 专题3 重组综合练(湖北)期末终极研习室(高二人教A版)(已下线)通关练04 空间向量与立体几何大题9考点精练(41题)- 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
更新时间:2023-04-22 17:27:49
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】如图,在多面体
中,平面
平面
,
平面
,
和
均为正三角形,
,
,点
在
上.
(1)若
平面
,求
;
(2)若
是
的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/5/1d9c99e6-431b-4674-82d1-6ff1cb14ba75.png?resizew=158)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd0a3b418f3b1ae176d2e9c5b4987de.png)
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适中
(0.65)
解题方法
【推荐2】如图,在直三棱柱
中,
,
,M,N,Q分别为
,BC,AC的中点,点P在线段
上运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/ef139c6b-82ed-4414-94f1-7d3cbccecc22.png?resizew=162)
(1)证明:
平面PNQ;
(2)是否存在点P,使得平面PMN与平面ABC的夹角为60°?若存在,试确定点P的位置:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cf3bff56a7f4ab6c0008e90823025d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4e8556f77d5f273ee1c3afe87175d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008efa3204b3fe4cc234b507bc59fb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb16f7dbc4b9993c4efa0764df1d8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760ad64e1f3e9fe178e69897076db07e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/ef139c6b-82ed-4414-94f1-7d3cbccecc22.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1337ec0af72822be72c4bb4926a4e642.png)
(2)是否存在点P,使得平面PMN与平面ABC的夹角为60°?若存在,试确定点P的位置:若不存在,请说明理由.
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解答题-问答题
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适中
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解题方法
【推荐1】如图,在四棱锥P-ABCD中,PC⊥底面ABCD,四边形ABCD是直角梯形,AB⊥AD,AB∥CD,AB=2AD=2CD=2,E是PB的中点.若二面角P-AC-E的余弦值为
,求直线PA与平面EAC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/979ea31f-6822-4ff0-9218-2471ed1b454f.png?resizew=202)
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适中
(0.65)
解题方法
【推荐2】平行四边形
中(图1),
,
,将
以
为折痕折起,使得平面
平面
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/4fd0e195-70dd-475c-8fb4-6c48b3d86066.png?resizew=341)
(1)证明:平面
平面
;
(2)已知点M为线段
上的点,若二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6f36741b86f464be362b12bac13d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe052786101dfcc941480919eb2cecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/4fd0e195-70dd-475c-8fb4-6c48b3d86066.png?resizew=341)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d138354c4e021ac8ae2a2fb176ca14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd148d264bc9043396f777523e907aa.png)
(2)已知点M为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64785e4401e1d79632e360fd3626ed62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17f6373a1d19523b126469295d9c9c9.png)
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【推荐3】在如图所示的几何体中,四边形ABCD为正方形,
平面ABCD,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/12/24/2879338726187008/2885782982721536/STEM/f57182152d04495d9422f7417512ee73.png?resizew=144)
(1)求证:
平面PAD;
(2)求直线PD与平面PCE所成角的正弦值;
(3)在棱AB上是否存在一点F,使得平面EPC和平面FPC所成角为60°?如果存在,确定点F的位置;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e2605cd905f703a8fda77540347ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82465b63174087aeba7788ed984583d2.png)
![](https://img.xkw.com/dksih/QBM/2021/12/24/2879338726187008/2885782982721536/STEM/f57182152d04495d9422f7417512ee73.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a20ea69475dcf57a5ff18c13eceaaa.png)
(2)求直线PD与平面PCE所成角的正弦值;
(3)在棱AB上是否存在一点F,使得平面EPC和平面FPC所成角为60°?如果存在,确定点F的位置;如果不存在,说明理由.
您最近一年使用:0次