名校
1 . 如图,四棱锥
中,底面
为梯形,
底面
,
,过A作一个平面
使得
平面
.
(1)求平面
将四棱锥
分成两部分几何体的体积之比;
(2)若平面
与平面
之间的距离为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56051bbd7e6415f66ce5970d228dc4cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/3ea8526d-7e47-4ce0-a2a5-ecd0d2a875ff.png?resizew=195)
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5卷引用:广东省佛山市顺德区第一中学(南校区)2023-2024学年高二上学期第一次月考数学试题
广东省佛山市顺德区第一中学(南校区)2023-2024学年高二上学期第一次月考数学试题安徽省合肥市第一六八中学2017-2018学年高二(宏志班)上学期期末考试数学(理)试题1安徽省合肥市第一六八中学2017-2018学年高二(宏志班)上学期期末考试数学(理)试题2(已下线)1.4.2 用空间向量研究距离、夹角问题(AB分层训练)-【冲刺满分】2023-2024学年高二数学重难点突破+分层训练同步精讲练(人教A版2019选择性必修第一册)江苏省南京市第五高级中学2023届高三高考热身数学试题
名校
2 . 正方体
的棱长为2,点
为
的中点,点
为线段
上靠近
的三等分点,平面
交
于点
,则
的长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:广东省广州市广东实验中学2019-2020学年高三第三次阶段考试文科数学试题
广东省广州市广东实验中学2019-2020学年高三第三次阶段考试文科数学试题广州市2018届高三上学期第一次调研测试理科数学试题广州市2018届高三第一学期第一次调研测试文科数学试题(已下线)2018年高考数学备考中等生百日捷进提升系列(捷进提升篇)专题08 立体几何福建省莆田第十五中学2019届高三上学期期中考试数学理科试题
3 . 在如图所示的圆台中,
是下底面圆
的直径,
是上底面圆
的直径,
是圆台的一条母线.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/d8dfa2d9ecab4a0bac28eb4cb0ea2d11.png)
(1)已知
分别为
的中点,求证:
;
(2)已知
,
,求二面角
的余弦值.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/c2026a00dac745a68d4be98ea57eb968.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/a994fec3fcf7465893f75c85217ef6ed.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/0417464253404fc491a1b3f2c534446d.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/315207c4cfdc43f487d79597ecc3af03.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/59ae6b20c1c44748857ac45f52020115.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/d8dfa2d9ecab4a0bac28eb4cb0ea2d11.png)
(1)已知
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/9421fba81f044da9927d1133821ca8b1.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/33636cafc63c46508c6d51a7dd3e22d5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/3b5afd95420043b48d0f0b9ce314d996.png)
(2)已知
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/1018033148a743d9a84f8b7d80c4a7fa.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/c6d9212110084093b3757a8bc01a3f03.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/757b3eb9e96f4cf98b32ada934b17a44.png)
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12-13高三·广东广州·开学考试
名校
4 . 对于平面
、
、
和直线
、
、
、
,下列命题中真命题是
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571326849302528/1571326854561792/STEM/870013c7d8ef410eb32b1370739a2205.png?resizew=15)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2016-12-02更新
|
1809次组卷
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8卷引用:2014届广东省汕头四中高三第二次月考理科数学试卷
(已下线)2014届广东省汕头四中高三第二次月考理科数学试卷(已下线)2014届广东省广州市海珠区高三入学摸底考试理科数学试卷(已下线)2014届广东省广州市海珠区高三入学摸底考试文科数学试卷2015届河北省唐山市一中高三12月调研考试理科数学试卷广东第二师范学院番禺附属中学2018-2019学年高一下学期期末测试数学试题(已下线)2015届福建省惠安一中等三校高三上学期期中联考文科数学试卷安徽省铜陵市第一中学2018-2019学年高二上学期期中数学试题湖北省襄阳五中、夷陵中学、钟祥一中三校2020届高三下学期6月高考适应性考试理科数学试题
11-12高一上·广东揭阳·阶段练习
5 . 如图,正四棱锥S-ABCD的底面是边长为
正方形,O为底面对角线交点,侧棱长是底面边长的
倍,P为侧棱SD上的点.
.![](https://img.xkw.com/dksih/QBM/2011/12/7/1570560179462144/1570560184819712/STEM/60292b23160c46d296057206d9af6af4.png?resizew=215)
(Ⅰ)求证:AC⊥SD
(Ⅱ)若SD⊥平面PAC,
为
中点,求证:
∥平面PAC;
(Ⅲ)在(Ⅱ)的条件下,侧棱SC上是否存在一点E, 使得BE∥平面PAC.若存在,求SE:EC的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
.
![](https://img.xkw.com/dksih/QBM/2011/12/7/1570560179462144/1570560184819712/STEM/60292b23160c46d296057206d9af6af4.png?resizew=215)
(Ⅰ)求证:AC⊥SD
(Ⅱ)若SD⊥平面PAC,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(Ⅲ)在(Ⅱ)的条件下,侧棱SC上是否存在一点E, 使得BE∥平面PAC.若存在,求SE:EC的值;若不存在,试说明理由.
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9-10高三·广东东莞·阶段练习
名校
6 . 已知四边形
为矩形,
,
,
、
分别是线段
、
的中点,
面
.
(Ⅰ)求证:
;
(Ⅱ)设点
在
上,且
面
,试确定点
的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb2fbbce7207d2b2bdd5c5ab61ecd04.png)
(Ⅱ)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa169cb28a2d23bf28a931362fa0320b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0901e2f5cefe6468cbbcaa332287d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2010/10/21/1569860235747328/1569860241113088/STEM/018edd86b3b64c19ac5f634b759b8621.png?resizew=152)
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3卷引用:2011届广东省东莞市五校高三第一次联考文科数学卷