解题方法
1 . 如图所示,四边形
为菱形.
,
,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/a47ef5fd-88fd-4f27-8e17-ae81bb47381d.png?resizew=153)
(1)证明:平面
平面
;
(2)若平面
平面
,求实数a的值.
(3)若
,求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b7af35a4b337ee57859c186abc0c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277ad9925f187b4bd4e79e9a2c611c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0bd4b30dc777ac9da80f6baa3eb31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/a47ef5fd-88fd-4f27-8e17-ae81bb47381d.png?resizew=153)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,在直三棱柱
中,
,
,
,
分别是
和
上动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/d1679b91-1efc-453a-9e15-3702d560a63b.png?resizew=144)
(1)求证:
;
(2)若
,求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8f940b796af67206b3f9dd410a407.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/d1679b91-1efc-453a-9e15-3702d560a63b.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c75464d4192176556f86d01fe20c9e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b27af7868ae7bfc55d597d44f8bfe30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be1faf8713ce4d71f82f086ca4712c3.png)
您最近一年使用:0次
2020-05-13更新
|
238次组卷
|
4卷引用:新疆乌鲁木齐2019-2020学年高三年级第二次诊断性测试理科数学试题
解题方法
3 . 如图,在四棱锥
中,四边形
为梯形,且AB
DC,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/4e9f54d7-9df7-4c57-b74a-04b4a8aad691.png?resizew=209)
(Ⅰ)证明:平面
平面
;
(Ⅱ)若
,
,求二面角
的余弦值.
![](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/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/4e9f54d7-9df7-4c57-b74a-04b4a8aad691.png?resizew=209)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f04579e4c69a5b6b895e0c44a94532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83c3f76bc7569c3c088da98bb3b2c50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
2020-05-09更新
|
280次组卷
|
2卷引用:2020届新疆高三第一次模拟测试(问卷)数学(理科)试题
名校
解题方法
4 . 如图所示,在四棱锥
中,底面
为正方形,
,
,
,
,
为
的中点,
为棱
上的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/6d3bda83-a948-4340-a33c-3d47b4483cc7.png?resizew=167)
(1)证明:面
面
;
(2)当
为
中点时,求二面角
余弦值.
![](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/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfb8347b22077e850fe698eabbb2f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/6d3bda83-a948-4340-a33c-3d47b4483cc7.png?resizew=167)
(1)证明:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92c3dbf9981a81f4093c9760943e21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de4bf00668ed43b09cfe7fbef2a85c3.png)
您最近一年使用:0次
2020-04-24更新
|
797次组卷
|
7卷引用:新疆新和县实验中学2023届高三上学期第一次月考数学(理)试题
新疆新和县实验中学2023届高三上学期第一次月考数学(理)试题2020届山东省淄博市高三一模数学试题(已下线)理科数学-2020年高考押题预测卷03(新课标Ⅱ卷)《2020年高考押题预测卷》(已下线)专题九 立体几何与空间向量-2020山东模拟题分类汇编四川省泸县第一中学2020-2021学年高二上学期第二次月考数学(理)试题宁夏石嘴山市第三中学2022届高三第三次模拟考试数学(理)试题广东省揭阳市揭阳第一中学榕江新城学校2023-2024学年高二上学期期中数学试题
5 . 如图,
是正方形,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438548601126912/2439124382507008/STEM/a42bd0fad1d64b99b20b1129fcae9d1d.png?resizew=209)
(1)求证:
;
(2)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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74fa1eae202ccd566b2b45acac0e9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b59f0e6f7fa9c50e7f5cc146ba1af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1320d278639db3be64624b857a61b39.png)
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438548601126912/2439124382507008/STEM/a42bd0fad1d64b99b20b1129fcae9d1d.png?resizew=209)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d603566c74b1d5de510a2e8f7859010.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f18f6c39be0fc537fc3ae491107843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解题方法
6 . 如图,在多面体ABCDEF中,底面ABCD是正方形,梯形
底面ABCD,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/11b18a49-5743-43c4-817e-8c471459679c.png?resizew=167)
(Ⅰ)证明:平面
平面
;
(Ⅱ)求直线AF与平面CDE所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3e598620671950ba89b85ab0c73b32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/11b18a49-5743-43c4-817e-8c471459679c.png?resizew=167)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf84ed033bd035c2fe7552badd5e447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14eec658f69c267a70c1e8f9b744e282.png)
(Ⅱ)求直线AF与平面CDE所成角的大小.
您最近一年使用:0次
2020-04-23更新
|
251次组卷
|
2卷引用:新疆维吾尔自治区2019-2020学年高三适应性检测理科数学(问卷)试题
名校
7 . 如图,四棱锥P﹣ABCD中,底面ABCD是边长为2的菱形,∠ABC=60°,AC与BD交于点O,PO⊥平面ABCD,E为CD的中点连接AE交BD于G,点F在侧棱PD上,且DF
PD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/38afbe2e-f816-43f7-ab3e-eee667c398fa.jpg?resizew=183)
(1)求证:PB∥平面AEF;
(2)若
,求三棱锥E﹣PAD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34efd0021d06e31448496f3673eb2a45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/38afbe2e-f816-43f7-ab3e-eee667c398fa.jpg?resizew=183)
(1)求证:PB∥平面AEF;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22cb5ed404d1e119d4ffe95ec18f999a.png)
您最近一年使用:0次
2020-01-12更新
|
634次组卷
|
4卷引用:新疆维吾尔自治区乌鲁木齐市第六十八中学2024届高三上学期1月月考数学试题
2011高三·河北·专题练习
名校
解题方法
8 . 已知双曲线的中心在原点,焦点F1,F2在坐标轴上,离心率为
,且过点
.点M(3,m)在双曲线上.
(1)求双曲线的方程;
(2)求证:
;
(3)求△F1MF2的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2776e22e73b1bf3914056e1fa2aa3a.png)
(1)求双曲线的方程;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19de2aa3e4ebac2e720d6b3e04523847.png)
(3)求△F1MF2的面积.
您最近一年使用:0次
2020-01-21更新
|
1100次组卷
|
20卷引用:新疆阿克苏市实验中学2019-2020学年高二上学期第二次月考数学(理)试题
新疆阿克苏市实验中学2019-2020学年高二上学期第二次月考数学(理)试题新疆博尔塔拉蒙古自治州第五师高级中学2019-2020学年高二上学期第二次月考数学(文)试题(已下线)新课标高三数学椭圆、双曲线专项训练(河北)2014-2015学年甘肃省兰州一中高二上学期期末考试数学试卷2014-2015学年河北省故城县高级中学高二12月月考数学试卷2015-2016学年广东湛江一中高二上第二次考试理科数学卷人教版 全能练习 选修1-1 单元知识测评(二)【市级联考】安徽省定远重点中学2018-2019学年高二上学期第三次月考数学(文)试题(已下线)2019年1月13日 《每日一题》文数(高二上期末复习)人教必修5+选修1-1-每周一测黑龙江省哈尔滨市宾县一中2019-2020学年高二上学期第一次月考数学(理)试题安徽省阜阳市第三中学2019-2020学年高二上学期10月月考数学(文)试题山西省朔州市应县第一中学校2019-2020学年高二上学期第四次月考数学(理)试题(已下线)专题9.6 双曲线(练)【理】-《2020年高考一轮复习讲练测》山西省晋中市平遥县第二中学2019-2020学年高二上学期12月月考数学试题(已下线)专题11 圆锥曲线的方程综合练习-(新教材)2020-2021学年高二数学单元复习(人教A版选择性必修第一册)(已下线)专题42双曲线-2022年(新高考)数学高频考点+重点题型山东省临沂市兰山区、罗庄区2021-2022学年高二上学期中考试数学试题山东省临沂市兰陵县2021-2022学年高二上学期期中数学试题山东省临沂市多县区2021-2022学年高二上学期期中教学质量检测数学试题(已下线)3.2.2双曲线的简单几何性质(第2课时)(分层作业)(3种题型分类基础练+能力提升练)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第一册)
名校
9 . 如图(1)所示,在
中,
是
边上的高,且
,
,
是
的中点.现沿
进行翻折,使得平面
平面
,得到的图形如图(2)所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/1b428bdc-fab4-49bd-9520-3d5bf606e60e.png?resizew=330)
(1)求证:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60bb2e3631f46fc8a24595efce01a92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/1b428bdc-fab4-49bd-9520-3d5bf606e60e.png?resizew=330)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
2020-01-01更新
|
432次组卷
|
7卷引用:新疆乌鲁木齐市第八中学2020-2021学年高二上学期期末考试数学(理)试题
名校
10 . 如图,在直三棱柱
中,
,
,
,
.
(1)证明:
;
(2)求二面角
的余弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/18e1de85-c64e-480a-80be-85b7e59874fe.png?resizew=131)
(1)证明:
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2020-01-19更新
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13卷引用:新疆阿克苏市实验中学2019-2020学年高二上学期第一次月考数学(理)试题
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