名校
解题方法
1 . 如图,已知正三棱柱ABC-A1B1C1的所有棱长都相等,棱AC,A1C1的中点分别为M,N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/bbf26605-acf0-4e6a-b138-9bbce2825444.png?resizew=162)
(1)求证:B1N⊥C1M;
(2)求异面直线BN与C1M所成角的余弦值;
(3)求平面A1BM与平面ABC1所成二面角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/bbf26605-acf0-4e6a-b138-9bbce2825444.png?resizew=162)
(1)求证:B1N⊥C1M;
(2)求异面直线BN与C1M所成角的余弦值;
(3)求平面A1BM与平面ABC1所成二面角的正弦值.
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2023-02-04更新
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2卷引用:江苏省南京师范大学附属中学江宁分校等2校2022-2023学年高三上学期期末联考数学试题
解题方法
2 . 如图,在四棱锥
中,
平面
,底面
是边长为1的菱形,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/6/2693986033500160/2808845291610112/STEM/a46e6af6-b2b6-4425-b40d-83e5bd5e5033.png?resizew=207)
(1)若
是
的中点,求证:
平面
;
(2)求异面直线
与
所成角的余弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://img.xkw.com/dksih/QBM/2021/4/6/2693986033500160/2808845291610112/STEM/a46e6af6-b2b6-4425-b40d-83e5bd5e5033.png?resizew=207)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
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2021-09-15更新
|
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2卷引用:江苏省南京师范大学附属实验学校2019-2020学年高一下学期第二次月考数学试题
名校
解题方法
3 . 已知圆台
轴截面
,圆台的上底面圆半径与高相等,下底面圆半径为高的两倍,点
为下底圆弧
的中点,点
为上底圆周上靠近点A的
的四等分点,经过
、
,
三点的平面与弧
交于点
,且
,
,
三点在平面
的同侧.
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623414807764992/2625287742152704/STEM/b1a529c0-e031-4ab6-8396-c3f4fbdd0925.png?resizew=288)
(1)判断平面
与直线
的位置关系,并证明你的结论﹔
(2)
为上底圆周上的一个动点,当四棱锥
的体积最大时,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623414807764992/2625287742152704/STEM/b1a529c0-e031-4ab6-8396-c3f4fbdd0925.png?resizew=288)
(1)判断平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9ba6567acb4d331c204b6d2105f980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
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2020-12-30更新
|
596次组卷
|
4卷引用:江苏省南京市江宁高级中学2020-2021学年高三上学期迎接八省联考适应性练习数学试题
名校
解题方法
4 . 如图,在正方体
中,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/37193ca5-079c-468b-b430-157639055c27.png?resizew=155)
(1)求异面直线
与
所成角的余弦值;
(2)棱
上是否存在点
,使得
平面
?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ab6986bf225aad0e80f4153b1ce032.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/37193ca5-079c-468b-b430-157639055c27.png?resizew=155)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1158eaa2e338f564eb18de5bef1d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
(2)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8010e19931e31f7d49a10515d14de46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c878e789e07e33d65c8a18cf2c58a.png)
您最近一年使用:0次
2019-09-26更新
|
1952次组卷
|
16卷引用:江苏省南京市第二十七高级中学2020-2021学年高二上学期第一次学情调研数学试题
江苏省南京市第二十七高级中学2020-2021学年高二上学期第一次学情调研数学试题山西省长治市第二中学2019-2020学年高二上学期第一次月考数学(理)试题山西省长治市第二中学校2019-2020学年高二上学期10月月考数学试题山西省长治市第二中学校2019-2020学年高二上学期第一次月考数学(文)试题山东省济宁市实验中学2020-2021学年高二10月月考数学试题山东省枣庄市第八中学(东校区)2020-2021学年高二9月月考数学试题(已下线)专题04 空间向量与立体几何(单元测试卷)-2020-2021学年高中数学新教材人教A版选择性必修配套提升训练(已下线)专题1.3 空间向量的应用(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)吉林省吉林市吉化第一高级中学校2020-2021学年高二上学期期末数学(理)试题江苏省镇江市女中2020-2021学年高二下学期期中数学试题(已下线)专练6 空间向量的应用-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)黑龙江省哈尔滨市第六中学2019-2020学年高二上学期期中数学(理)试题山东省济宁市泗水县2021-2022学年高二上学期期中数学试题河南省许昌市禹州市北大公学禹州国际学校2022-2023学年高二上学期9月月考数学试题黑龙江省哈尔滨市第六中学校2020-2021学年高二上学期期中考试数学(理)试题宁夏固原市第五中学2022-2023学年高二下学期第二次月考数学(理)试题
11-12高二上·江苏南京·期末
5 . 正四棱锥
中,
,
点M,N分别在PA,BD上,且
.
(Ⅰ)求异面直线MN与AD所成角;
(Ⅱ)求证:
∥平面PBC;
(Ⅲ)求MN与平面PAB所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
点M,N分别在PA,BD上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978258071bfa81582203fc2ee85d75b6.png)
(Ⅰ)求异面直线MN与AD所成角;
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(Ⅲ)求MN与平面PAB所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2011/5/15/1570199704657920/1570199709966336/STEM/9f148e2a62e44fc9b609419a2db73efb.png)
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