名校
1 . 如图1,在平行四边形
中,
,
,
,
分别为
,
的中点.将
沿
折起到
的位置,使得平面
平面
,将
沿
折起到
的位置,使得二面角
的大小为
,连接
,
,
,得到如图2所示的多面体
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/a76e9329-3946-4960-92bf-7afcbe911b7d.png?resizew=351)
(1)证明:
.
(2)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/8716471e79e95c41c9dd4fa597e33a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b3e7c7845a0ec3cbac709fda131764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84921fe94af851c4f12166f8ce2300f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c4cfe818c2326a12667c4d75fc6106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c817ea931827b6b6749623c543f3f663.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/a76e9329-3946-4960-92bf-7afcbe911b7d.png?resizew=351)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8347d61646a28fc850cca8ef44a16ea6.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d365ce9f4bacc4d4bb15dbdb5306a5.png)
您最近一年使用:0次
2022-12-20更新
|
140次组卷
|
2卷引用:河北省定兴中学等校2022-2023学年高二上学期12月联考数学试题
2 . 如图,在平行四边形ABCD中,
,
,四边形ACEF为矩形,平面
平面ABCD,
,点G在线段EF上运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/411eb720-d5ad-4da0-8c1c-d262cb064929.png?resizew=160)
(1)当
时,求
的值;
(2)在(1)的条件下,求平面GCD与平面CDE夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b845a977ddf0e9f8f3f38e51c4fab865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d01872723102269f05c9d1b77c6e34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a4e3f0349fa83dc2a0b7d798f04843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cee0f36dc452e58086832c0152b641.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/411eb720-d5ad-4da0-8c1c-d262cb064929.png?resizew=160)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119e066d5bc6229d203536a09e55ced7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8238813f9604a86c9d2a4a5ae9fbb117.png)
(2)在(1)的条件下,求平面GCD与平面CDE夹角的余弦值.
您最近一年使用:0次
2022-12-20更新
|
227次组卷
|
3卷引用:河北省邢台市内丘县等5地2022-2023学年高二上学期第三次(12月)月考数学试题
3 . 如图,已知矩形
所在平面与平面
垂直,在直角梯形
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/33c99ddc-673e-48e7-8d41-ad78000f6a82.png?resizew=168)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb55b4b96849ab53b0cb97332801b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb55b4b96849ab53b0cb97332801b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5f33fc17da76afec7d7dfcda096e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f6e53fed78ccd62a5a9d2f64938a96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153e87e7f8396a6f4e57a4e45867c4ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/33c99ddc-673e-48e7-8d41-ad78000f6a82.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9ee68a3fdc62a86e53d4048e8fc04e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335187895f612ce811414cfbedf89467.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd6a2215f47cdb01078326d245b1523.png)
您最近一年使用:0次
2022-12-18更新
|
344次组卷
|
5卷引用:河北省衡水市第十三中学2022-2023学年高二上学期质检(三)数学试题
名校
4 . 如图,四棱锥
中,
平面
,底面
是正方形,
,E为PC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ed9fe480-9258-401d-9486-91c3e577ee09.png?resizew=208)
(1)求证:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99926bf272cd757f0985c69b390ebcce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ed9fe480-9258-401d-9486-91c3e577ee09.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eaa13915786802de6a540d56dec821b.png)
您最近一年使用:0次
名校
5 . 已知直三棱柱
中,侧面
为正方形,
,E,F分别为
和
的中点,D为棱
上的动点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/55edc25a-1dac-4735-a073-bc8bd2e829c3.png?resizew=147)
(1)证明:
平面
;
(2)当
为何值时,平面
与平面
所成的夹角最小?
![](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/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f60db833d4ff6b92c78029e8264ca1c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/55edc25a-1dac-4735-a073-bc8bd2e829c3.png?resizew=147)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7faff77beaccc4ff656bfcea13f416.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c9a36e2ef7189317ae652c56e49c8.png)
您最近一年使用:0次
2022-12-12更新
|
373次组卷
|
2卷引用:河北省张家口市部分学校2022-2023学年高二上学期期中数学试题
解题方法
6 . 如图,正方体
的棱长为2,点E,F为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/0f54061b-86f4-45a1-b266-bfdad27268c0.png?resizew=160)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/0f54061b-86f4-45a1-b266-bfdad27268c0.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe02a25afc35da213ba4aee378a308b.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
您最近一年使用:0次
名校
解题方法
7 . 设
,
是空间中两条不同的直线,
,
是两个不同的平面,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-12-06更新
|
810次组卷
|
9卷引用:河北省高碑店市崇德实验中学2022-2023学年高二上学期期中数学试题
河北省高碑店市崇德实验中学2022-2023学年高二上学期期中数学试题(已下线)突破1.4 空间向量的应用(课时训练)江苏省盐城中学2022-2023学年高二上学期第一次月考数学试题湖南省长沙市长郡中学2022-2023学年高二上学期第二次模块检测数学试题湖南省衡阳市2022届高三下学期二模数学试题湖北省部分省级示范高中2022-2023学年高二上学期期末数学试题(已下线)1.4.1 用空间向量研究直线、平面的位置关系(重难点突破)-【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)(已下线)专题39:平行垂直空间向量证法 -2023届高考数学一轮复习精讲精练(新高考专用)(已下线)第30练 空间向量的应用
名校
8 . 如图①,在平面多边形ABCDE中,
,
为等腰直角三角形,四边形ABCD为等腰梯形,且
,沿AD将
折起,使得
,M为BC的中点,连接AM,BD,如图②.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/0e646831-934c-44b8-a6d4-a844e88e8916.png?resizew=414)
(1)证明:
;
(2)求直线DE与平面BEM所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7624907b562e102da1fdbb10bc43895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783a833992e0862211a15fec2d3e3dda.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/0e646831-934c-44b8-a6d4-a844e88e8916.png?resizew=414)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e309053297619d3b46fcec970b68509.png)
(2)求直线DE与平面BEM所成角的正弦值.
您最近一年使用:0次
2022-12-03更新
|
459次组卷
|
3卷引用:河北省邢台市2022-2023学年高二上学期第一次月考数学试题
名校
解题方法
9 . 在长方体
中,底面
是边长为4的正方形,
,过点
作平面
与
分别交于M,N两点,且
与平面
所成的角为
,给出下列说法:
![](https://img.xkw.com/dksih/QBM/2022/7/5/3016088399233024/3016996132487168/STEM/59a23e98b8ba4cb5a36690fa638e3342.png?resizew=255)
①异面直线
与
所成角的余弦值为
;
②
平面
;
③点B到平面
的距离为
;
④截面
面积的最小值为6.
其中正确的是__________ (请填写所有正确说法的编号)
![](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/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2022/7/5/3016088399233024/3016996132487168/STEM/59a23e98b8ba4cb5a36690fa638e3342.png?resizew=255)
①异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8459f5f41754890d52b74652ef1f3af1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4508dc6d9c91157836be679c0543cac.png)
③点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53a3f4fbfdc9d743be259cb8a7b6b2f.png)
④截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e74395b07e8153a0ef0bbcb5881013f.png)
其中正确的是
您最近一年使用:0次
2022-07-06更新
|
1304次组卷
|
8卷引用:河北省邢台市2021-2022学年高二下学期期末数学试题
10 . 已知四边形
为矩形,
平面
,连接
,
,
,
,
,则下列各组向量中,数量积一定为零的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2022-11-14更新
|
310次组卷
|
4卷引用:河北省秦皇岛市青龙满族自治县实验中学2022-2023学年高二上学期期中数学试题