解题方法
1 . 已知平行六面体(底面是平行四边形的四棱柱)
的各条棱长均为2,且有
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/aa077cfa-a8b6-41f4-ad0c-57cc7d00cd83.png?resizew=193)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c11d8367d24d75fd15c774e3ef6d37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/aa077cfa-a8b6-41f4-ad0c-57cc7d00cd83.png?resizew=193)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
您最近一年使用:0次
名校
解题方法
2 . 在平行四边形ABCD中,
,
,
,过D点作
于E,以DE为轴,将
向上翻折使平面
平面BCDE,连接CE,F点为线段CE的中点,Q为线段AC上一点.
(1)证明:
;
(2)若二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c772461aef1d9d715129636739748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/cf5629b1-8541-4901-b46c-977acf226849.png?resizew=322)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfe02a5d85618884803e98257922c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79bbc95a59f754acf111bcba7cd14c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe5e47c1cfe0d419bacbba32851ed71.png)
您最近一年使用:0次
2023-05-26更新
|
925次组卷
|
3卷引用:湖北省武汉市华中师范大学第一附属中学2023届高三下学期5月压轴卷数学试题(一)
名校
3 . 如图,在三棱柱
中,
平面
,D,E分别为棱AB,
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/ce020f37-dca6-4b5f-84e4-c90d525860f5.png?resizew=152)
(1)证明:
平面
;
(2)若三棱锥
的体积为
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25e8fc3dda4f8b45491514b6e22a962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee631002406bf7468e534b647fc918a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/ce020f37-dca6-4b5f-84e4-c90d525860f5.png?resizew=152)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7cd40c9d26ada55e07fa71a4b98be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf462eaaad82d6bc3b460385fd9f0de.png)
您最近一年使用:0次
2023-05-13更新
|
1060次组卷
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3卷引用:湖北省黄冈市浠水县第一中学2023届高三下学期5月高考仿真模拟数学试题
湖北省黄冈市浠水县第一中学2023届高三下学期5月高考仿真模拟数学试题黑龙江省齐齐哈尔市第八中学校2022-2023学年高一下学期6月月考数学试题(已下线)艺体生一轮复习 第七章 立体几何 第36讲 空间向量在立体几何中的应用【练】
名校
解题方法
4 . 如图,在三棱台
中,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/f314c732-7e6b-4546-bdc8-503c0ebb3807.png?resizew=209)
(1)证明:平面
平面
;
(2)若
,
,
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/f314c732-7e6b-4546-bdc8-503c0ebb3807.png?resizew=209)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a99ef32b30524326ce26f117cd7f5a91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7cff6f0357c77698b5f915ce1833f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ceca871d5d223f616d158c52ae1e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d2d2591aee7b818e41c93f58efc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef671ff46a372d5351b8c2f9eb26b48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed8c10f56d59217c8c1a650224278b87.png)
您最近一年使用:0次
2023-05-12更新
|
590次组卷
|
2卷引用:湖北省鄂东南省级示范高中教育教学改革联盟学校2023届高三下学期5月模拟联考数学试题
名校
解题方法
5 . 三棱柱
中,侧面
是矩形,
,
.
面ABC;
(2)若
,
,
,在棱AC上是否存在一点P,使得二面角
的大小为45°?若存在求出,不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686849a983d24dd62270b2967708cc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1515a445310d259a080d02e16c2e58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3ccdf2159fb372476e3273d7d844e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5cbb31d457451479eb9d50954a75d1.png)
您最近一年使用:0次
2023-09-22更新
|
1321次组卷
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7卷引用:湖北省部分学校2024届高三下学期模拟考试数学试题
湖北省部分学校2024届高三下学期模拟考试数学试题广东省深圳市实验中学、深圳市高级中学、珠海市第一中学、北江中学、湛江市第一中学等五校2023届高三上学期11月期中联考数学试题广东省东莞市万江中学2023-2024学年高二上学期10月月考数学试题广东省佛山市南海区南海中学2023-2024学年高二上学期第一次段考(10月)数学试题广东省广州市花都一中2023-2024学年高二上学期10月月考数学试题(已下线)专题03 空间向量求角度与距离10种题型归类-【巅峰课堂】2023-2024学年高二数学上学期期中期末复习讲练测(人教A版2019选择性必修第一册)河南省焦作市第十二中学2024届高三上学期11月月考数学试题
名校
6 . 在三棱柱
中,四边形
是菱形,
,平面
平面
,平面
与平面
的交线为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/4507fe4b-337b-4808-b0ff-7e624d9cac18.png?resizew=152)
(1)证明:
;
(2)已知
上是否存在点
,使
与平面
所成角的正弦值为
?若存在,求
的长度;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce04b35c265cc9c48b60204bd2f718ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/4507fe4b-337b-4808-b0ff-7e624d9cac18.png?resizew=152)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f35646cb29fafd1e1a214b69e4f22d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cff9064850b9d7837de6e8ed30c092a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
您最近一年使用:0次
2023-05-04更新
|
1603次组卷
|
3卷引用:湖北省荆门市龙泉中学、荆州中学·、宜昌一中三校2023届高三下学期5月联考数学试题
名校
解题方法
7 . 如图,平行六面体
中,点P在对角线
上,
,平面
平面
.
三点共线;
(2)若四边形
是边长为2的菱形,
,
,求二面角
大小的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f2ff4c165222af48ba96a6014276b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b70c74a0f397e6e3e6d6f25429360a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
您最近一年使用:0次
2023-04-16更新
|
3147次组卷
|
5卷引用:湖北省武汉市华中师范大学第一附属中学2023届高三高考前素养数学试题
8 . 如图,四棱锥
的底面
为筝形,
于
点,
为
的五等分点,
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/87cd7a1a-151f-4b33-ade8-6f1b0fd4d2f0.png?resizew=183)
(1)求证:
;
(2)作出平面
与平面
所成二面角
的任意一条棱,并求该二面角
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/5762cefdf4b2edebd125c1e0620734bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd946dad8b716592833a7bc14045a6d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398fbc0610195cb3793a6520a160c59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9159748d09dc452605d7bffcec904f8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9d53c9f89997a16fd1b21493fc5b60.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/87cd7a1a-151f-4b33-ade8-6f1b0fd4d2f0.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0cbbcc3d79bf999588882e7b1b4324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
名校
9 . 如图,在长方体
中,点
,
分别在棱
上,且
,
.
(1)证明:
;
(2)若
,
,
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/b8e86e3991200297ad172455e5ea93f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756011818142183cfc91e89bd1474bef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0269380f0e04ad8e90c292eea56125.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/28/9056df57-6d22-4a56-a322-727de6cb5fa7.png?resizew=91)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537bedfb076851fe8a4ae9f42c98bdd7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2023-08-27更新
|
1466次组卷
|
6卷引用:湖北省荆州市松滋市第一中学2024届高三上学期迎一检模拟检测(三)数学试题
名校
10 . 如图,已知四棱锥
中,
,
,
,
平面
,平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/6297a192-b14e-4f8d-a374-57068a036435.png?resizew=121)
(1)证明:
;
(2)若
,且
,
为
的重心.求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeadd146662b5d8fe14a424138ef751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5beb1af9d2ffb7d0089dec2c1af554da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/6297a192-b14e-4f8d-a374-57068a036435.png?resizew=121)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8c91e4c85a9da7f54b2237d870a50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2ab6940dca62be1f3b2b5f8531990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f944f78358763be992bb3d55fff12f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-03-31更新
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1745次组卷
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3卷引用:湖北省十一校2023届高三下学期第二次联考数学试题