名校
解题方法
1 . 在荾形
中,
,
,将菱形
沿着
翻折,得到三棱锥
如图所示,此时
.
平面
;
(2)若点
是
的中点,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbaccd578a43b2397c8bdd50592fa07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若点
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2023-12-31更新
|
406次组卷
|
4卷引用:安徽省滁州市明光市第三中学2023-2024学年高二上学期11月月考数学
名校
解题方法
2 . 如图,在四棱柱
中,四边形
是正方形,
,
,
是棱
的中点,则直线
与直线
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/8a55c9ca-1bbc-4f8a-b9bf-430300e99498.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c7c194c5bc2986a21fd441c81495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e322f79e083e471b34950b9ffabffdc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1158eaa2e338f564eb18de5bef1d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/8a55c9ca-1bbc-4f8a-b9bf-430300e99498.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-13更新
|
579次组卷
|
6卷引用:安徽省滁州市实验中学等2校2022-2023学年高二上学期1月期末联考数学试题
安徽省滁州市实验中学等2校2022-2023学年高二上学期1月期末联考数学试题四川省绵阳市江油市江油中学2022-2023学年高二下学期期末数学理科试题(已下线)2.4.3 向量与夹角(同步练习)-【素养提升—课时练】2022-2023学年高二数学湘教版选择性必修第二册检测(提高篇)(已下线)1.2 空间向量基本定理 精讲(5大题型)-【题型分类归纳】2023-2024学年高二数学同步讲与练(人教A版2019选择性必修第一册)安徽省合肥市长丰县第一中学2023-2024学年高二上学期第一次月考数学考试试题(已下线)第01讲:空间向量(必刷9大考题+9大题型)-2023-2024学年高二数学上学期《考点·题型·难点》期末高效复习(人教A版2019选择性必修第一册)
名校
解题方法
3 . 如图,四棱锥
的底面是边长为2的菱形,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/d1247916-4abf-4118-a1e4-c3b29e8042d5.png?resizew=164)
(1)证明:平面
平面
.
(2)若
,且二面角
的大小为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2882f0b888c4a97e8a49c8737f1fef38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19816396837aec6aa044a1428e0825d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/d1247916-4abf-4118-a1e4-c3b29e8042d5.png?resizew=164)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c309a8fefe5005f98d8d4cc9c54ab7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/816b7f285cc55bbe5bf873538ba87230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2023-03-03更新
|
1398次组卷
|
5卷引用:安徽省滁州市定远县育才学校2023届高考冲刺数学试卷(四)
安徽省滁州市定远县育才学校2023届高考冲刺数学试卷(四)广东省名校联盟2023届高三下学期大联考数学试题广东省广州市广东番禺中学2022-2023学年高二下学期期中数学试题第一章 空间向量与立体几何 (练基础)(已下线)第09讲 拓展三:二面角的传统法与向量法(含探索性问题,7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)
4 . 如下图,已知平行四边形ABCD和平行四边形ACEF所在的平面相交于直线AC,EC⊥平面ABCD,AB=1,AD=2,∠ADC=60°,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/3790295c-c544-4a5d-9445-72b1e9b0051e.png?resizew=196)
(1)求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f414cce1427646590a7f7144efe2e26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/3790295c-c544-4a5d-9445-72b1e9b0051e.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b87b3be10408261827291574434d8e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b123303738a595ec0126beb0fa64a8.png)
您最近一年使用:0次
解题方法
5 . 如图,在四棱锥
中,底面
是直角梯形,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/8099f006-7d9c-4242-ae7e-72775e854ade.png?resizew=150)
(1)证明:平面
平面
;
(2)求直线
与平面
夹角的正弦值.
![](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/1ee1c0e1894891a82c6fd7816f8fe220.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/2023/3/28/8099f006-7d9c-4242-ae7e-72775e854ade.png?resizew=150)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
6 . 如图,在四棱锥
中,四边形
为矩形,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/2/38ae0c01-7683-49ad-9e13-5a8b91d2cf89.png?resizew=175)
(1)求线段
的长度;
(2)求异面直线
与
所成角的余弦值;
(3)若
为
的中点,证明:
.
![](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/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e598f65e3c3b3c1a047a575788baee94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/2/38ae0c01-7683-49ad-9e13-5a8b91d2cf89.png?resizew=175)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e253f0fbfa13dca5b4c7dce45fc47fe7.png)
您最近一年使用:0次
2023-01-01更新
|
572次组卷
|
4卷引用:安徽省滁州市定远县民族中学2022-2023学年高三上学期12月月考数学试题
安徽省滁州市定远县民族中学2022-2023学年高三上学期12月月考数学试题(已下线)模块一 专题11 空间向量与立体几何(已下线)第07讲 空间向量的数量积运算9种常见考法归类(1)河南省郑州市第一〇二高级中学2023-2024学年高二上学期10月月考数学试题
名校
解题方法
7 . 如图,已知四棱锥
的底面
是直角梯形,
,
,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c707f0202ec1aa233e1eeacc7a4587d.png)
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/c43fd5dd-9fcc-42f6-8593-bb91799d8b93.png?resizew=149)
(1)求
与
所成的角
(2)平面
与平面
所成的锐二面角余弦值
![](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/73d1c65a219c41f41ab34b9dd7a41bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c707f0202ec1aa233e1eeacc7a4587d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/c43fd5dd-9fcc-42f6-8593-bb91799d8b93.png?resizew=149)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0cbbcc3d79bf999588882e7b1b4324.png)
您最近一年使用:0次
2022-12-14更新
|
459次组卷
|
4卷引用:安徽省滁州市定远县育才学校2022-2023学年高二下学期开学考试数学试题
安徽省滁州市定远县育才学校2022-2023学年高二下学期开学考试数学试题江苏省淮安市涟水县第一中学2022-2023学年高三上学期第二次阶段检测数学试题(已下线)6.3.3 空间角的计算(练习)-2022-2023学年高二数学同步精品课堂(苏教版2019选择性必修第二册)江西省南昌县莲塘第一中学2022-2023学年高二上学期期末数学试题
解题方法
8 . 如图,棱长为2的正方体中,E,F分别是
,DB的中点,G在棱CD上,且
,H是
的中点.建立适当的空间直角坐标系,解决下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/5ecb8a2e-e5e5-4f11-8a07-7e5e25c00857.png?resizew=179)
(1)求异面直线EF和
所成角的余弦值;
(2)求FH的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/161f651ef002ac85870d46b04347b54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcaa043eed56b55c053fd9923b1d4bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f380fae9201fb0f46a3df1062a2bcdf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/5ecb8a2e-e5e5-4f11-8a07-7e5e25c00857.png?resizew=179)
(1)求异面直线EF和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f380fae9201fb0f46a3df1062a2bcdf2.png)
(2)求FH的长.
您最近一年使用:0次
2022-10-20更新
|
151次组卷
|
2卷引用:安徽省滁州市定远县育才学校2022-2023学年高二上学期12月月考数学试题
名校
解题方法
9 . 如图,在三棱锥
中,
,
,
,则异面直线OB与AC所成的角是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/71a7bda4-f613-4721-8dc2-b84ff6a6433a.png?resizew=239)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c66aa9636ddecb69feb1dc17dc515a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b14a89363fa1e1a3b74ed989a5311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158f785a72486d466316c813ee695303.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/71a7bda4-f613-4721-8dc2-b84ff6a6433a.png?resizew=239)
A.30° | B.60° | C.90° | D.120° |
您最近一年使用:0次
2022-09-02更新
|
1185次组卷
|
7卷引用:安徽省滁州市定远县育才学校2022-2023学年高二上学期12月月考数学试题
名校
10 . 如图,在直三棱柱
中,
为
的中点,
交
于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/74a8a3bf-fce4-412b-9bac-b42aaf6bd731.png?resizew=144)
(1)求证:
平面
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ff07ad0bf1241217558b357b84cfec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/74a8a3bf-fce4-412b-9bac-b42aaf6bd731.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75aea24647cd4d0b4b9aa513bf5457b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
您最近一年使用:0次
2022-08-25更新
|
1533次组卷
|
4卷引用:安徽省滁州市九校2021-2022学年高二下学期3月月考数学试题