1 . 三棱锥
中,
平面
,
,
,并且
是直角.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/00c24e80-c7c0-456e-97a3-6fe819ef484d.png?resizew=175)
(1)求二面角
所成角的余弦值;
(2)若
,
,
上各取一点
,
,设
(
),当
为何值时,平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d535bfd65eb04a29d64425d54b2acf86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c184f8272d86497134b0bc225c8645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/00c24e80-c7c0-456e-97a3-6fe819ef484d.png?resizew=175)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b787fcc1da13b8665a7d6a41a75328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0639327721a50d83bee4fdc44a9c468f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.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/6fc981f1af8f5e82d51da9e6f139c177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540ccd15435aa2d59e809d6a28fb2467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
您最近一年使用:0次
名校
2 . 如图,在圆台
中,
分别为上、下底面直径,且
,
,
为异于
的一条母线.
为
的中点,证明:
平面
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601050d23e9d0b81ee6c5eda991dbdf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86605a29fe8fff454e0db6b86047a8fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439cf259dd6137aa31bb99244a04ddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c95c0160e73beb94a4a1cbc0168e9a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afabf56cc68ea438a890f9fea04b708e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc9e0457471047bc750ecd31989414a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6647d7d03d64dc6eac2c9651badd9376.png)
您最近一年使用:0次
2023-03-29更新
|
5596次组卷
|
14卷引用:江苏省镇江市扬中市第二高级中学2023-2024学年高三上学期期末模拟数学试题3
江苏省镇江市扬中市第二高级中学2023-2024学年高三上学期期末模拟数学试题3江苏省八市(南通、泰州、扬州、徐州、淮安、连云港、宿迁、盐城)2023届高三二模数学试题重庆市缙云教育联盟2023届高三二模数学试题(已下线)专题07立体几何的向量方法(已下线)押新高考第20题 立体几何(已下线)江苏省八市2023届高三二模数学试题变式题17-22专题16空间向量与立体几何(解答题)江苏省部分四星级高中2023-2024学年高三上学期期初调研数学试题(已下线)江苏省南通市如皋市2023-2024学年高三上学期期初调研数学试题广东省湛江市第一中学2023-2024学年高二上学期第一次大考数学试题江苏省八市2023届高三下学期第二次调研测试数学试题(已下线)空间向量与立体几何江苏省南京外国语学校2023-2024学年高三上学期期中模拟数学试题2024届安徽省阜阳市皖江名校联盟高三模拟预测数学试题
名校
解题方法
3 . 已知四面体ABCD的顶点坐标分别为
,
,
,
.
(1)若M是BD的中点,求直线CM与平面ACD所成的角的正弦值;
(2)若P,A,C,D四点共面,且BP⊥平面ACD,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2d977eaaf129783581dcee97f44c96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2755d7f7751444a6ee6de623bdd836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4886655e4272d2a5eb40adf508e4aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ecacd53b31c86a5bd5e49e98badac0.png)
(1)若M是BD的中点,求直线CM与平面ACD所成的角的正弦值;
(2)若P,A,C,D四点共面,且BP⊥平面ACD,求点P的坐标.
您最近一年使用:0次
2023-03-02更新
|
319次组卷
|
4卷引用:福建省南平市2022-2023学年高二上学期期末质量检测数学试题
福建省南平市2022-2023学年高二上学期期末质量检测数学试题(已下线)第10讲 用空间向量研究直线、平面的位置关系4种常见方法归类(1)(已下线)核心考点08空间直线、平面的垂直-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)四川省成都市嘉祥教育集团2023-2024学年高二上学期期中考试数学试题
解题方法
4 . 我们知道,在平面中,给定一点和一个方向可以唯一确定一条直线.如点
在直线l上,
为直线l的一个方向向量,则直线l上任意一点
满足:
,化简可得
,即为直线l的方程.类似地,在空间中,给定一点和一个平面的法向量可以唯一确定一个平面.
(1)若在空间直角坐标系中,
,请利用平面
的法向量求出平面
的方程;
(2)试写出平面
(A,B,C不同时为0)的一个法向量(无需证明),并证明点
到平面
的距离为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1dab74e16403e8131f9f5b2a74f3a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41c46212d6f61fca9ce215a477ea1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfc3eef2f592a4e93a6968c7f31e32f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e463b86ed390c317de2383840fde5df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24f3197942ff7bd44f44651dd9123b2.png)
(1)若在空间直角坐标系中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3ad64b23e508734de034ce16e1ebbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
(2)试写出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46e2fbcd9ba92ca62a67fef9d9652db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9f353152c7f589c0caf5f964f803ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f20004bf3d4eb52ec732d8acc65672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e878d6f51b5830bd59f0d44aa5d8b38.png)
您最近一年使用:0次
5 . 在菱形
中,G是对角线
上异于端点的一动点(如图1),现将
沿
向上翻折,得三棱锥
(如图2).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/a5c5ae26-9a72-4725-a1d8-3920aa14715c.png?resizew=330)
(1)在三棱锥
中,证明:
;
(2)若菱形
的边长为
,
,且
,在三棱锥
中,当
时,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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/a5c5ae26-9a72-4725-a1d8-3920aa14715c.png?resizew=330)
(1)在三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d222d3bcc808dd5b62b2a9ccb543a6d7.png)
(2)若菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5a86745bfe1dfe7bc2683811210330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c5ec9dd29aeb62299a237fa1c19544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
6 . 在空间直角坐标系中,已知向量
,其中
分别是平面
与平面
的法向量.
(1)若
,求
.的值;
(2)若
且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85423b5c09668d5c838f41677810606c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af623ef66b94c322ab3d259edb5462b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727762c06eb504331d69cb33e43979d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa3610a990287d3ac756abae406540d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
您最近一年使用:0次
2023-02-13更新
|
344次组卷
|
4卷引用:山东省济宁市2022-2023学年高二上学期期末数学试题
山东省济宁市2022-2023学年高二上学期期末数学试题(已下线)模块一 专题2 A 空间向量的应用基础卷 期末终极研习室高二人教A版(已下线)2.4.1 空间直线的方向向量和平面法向量(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)陕西省榆林市第十中学2023-2024学年高二上学期第一次月考数学试题
解题方法
7 . 试分别解答下列两个小题:
(1)在空间直角坐标系Oxyz中,
,
,
,
,M为PA的中点,N为PB的中点,求B到平面OMN的距离;
(2)在各项均为正数的等差数列
中,
,且
,
,
为等比数列,设
,求数列
的前n项和
.
(1)在空间直角坐标系Oxyz中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4098582bf9572f219d7a7d1f30562d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b32ab04dd852329d5918b177c199eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df931f35ec49d757e781255c753dd8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31cdb99dfd9b121734a79575d0f5666d.png)
(2)在各项均为正数的等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c0ea785aa84765d7831ea924e99683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e191086446263b7bbbd93613577c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
8 . 如图,将边长为
的等边三角形
沿与边
平行的直线
折起,使得平面
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c2c5fc03-94dd-446e-a6fc-363ebb539b70.png?resizew=156)
(1)求平面
与平面
所成角的余弦值;
(2)若
平面
,试求折痕
的长;
(3)当点
到平面
距离最大时,求折痕
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c2c5fc03-94dd-446e-a6fc-363ebb539b70.png?resizew=156)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4a6b8ef3e79b4482388c3391d8b18.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
2021-09-30更新
|
220次组卷
|
2卷引用:黑龙江省牡丹江市第二高级中学2022-2023学年高一下学期期末数学试题