解题方法
1 . 如图,在空间直角坐标系
中,四棱柱
为长方体,
,点
,
分别为
的中点,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd407cdb6c758cdbe7e7216544f85b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce34c05c1445e027e9fc009907046e7e.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/c81e73dcdb8d3c374100ec83bf6983f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c8b9d5680c06f9e28c311d67cfadd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/c518b1ae-4ba9-4eee-960b-107167e5e2c1.png?resizew=181)
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2023-08-10更新
|
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3卷引用:江苏省徐州市铜山区铜北中学2022-2023学年高一下学期3月学情调查数学试题
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2 . 在三棱柱
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/39544dd4-de51-4094-9b7d-ac219b44e764.png?resizew=264)
(1)证明:
;
(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/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7bce5b3862e12e5c7d206c35052471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2f04faf03ca18388df766d654af211.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/39544dd4-de51-4094-9b7d-ac219b44e764.png?resizew=264)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40154fd2f71e4621d800834f3656fd40.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962ddfa6a45e5588279c2a93f142924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74848ad66000fd0270cafe90d754ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dba91f88e6404c86a48df67fdb6d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2023-04-20更新
|
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3卷引用:江苏省徐州市第一中学2022-2023学年高一下学期期中数学试题
20-21高二·全国·课后作业
名校
解题方法
3 . 已知几何体
,如图所示,其中四边形
、四边形
、四边形
均为正方形,且边长均为
,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/098fbaed-b0ed-4bae-a1c6-5e991b359a0f.png?resizew=149)
(1)求证:
.
(2)是否存在点
,使得直线
与平面
所成的角为
?若存在,确定点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806625a93511075586360d7f9f335f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce463fb3ce4b3d49d470f66471fe4c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50cfd99a702ee24f9ef94e4b6f50101f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/098fbaed-b0ed-4bae-a1c6-5e991b359a0f.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262ba9641d1dada44105a5cf7230b8d.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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8卷引用:江苏省徐州市铜山区铜北中学2022-2023学年高一下学期3月学情调查数学试题
江苏省徐州市铜山区铜北中学2022-2023学年高一下学期3月学情调查数学试题(已下线)第十二课时 课后 空间向量章末复习北师大版(2019) 选修第一册 突围者 第三章 专项拓展训练1 空间直角坐标系的构建策略吉林省长春市第二十九中学2021-2022学年高二上学期第一学程考试(月考)数学试题人教A版(2019) 选修第一册 实战演练 第一章 易错疑难突破专练(已下线)第08讲 空间向量的应用-【寒假自学课】2022年高二数学寒假精品课(苏教版2019选择性必修第二册)河南省驻马店开发区高级中学2022-2023学年高二上学期期中考试数学试题新疆乌鲁木齐市米泉中学(原米泉市一中分校)2022-2023学年高二上学期期末数学试题
20-21高二·全国·课后作业
名校
4 . 如图,在空间直角坐标系中有直三棱柱ABC-A1B1C1,CA=CC1=2CB,则直线BC1与直线AB1所成角的余弦值为________
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/2331167c-17c8-4416-b5de-d2482d67b0d6.png?resizew=194)
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2021-08-27更新
|
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5 . 如图,
为圆锥的顶点,
是圆锥底面的圆心,
是底面的内接正三角形,
为底面直径.已知
.
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720704680206336/2764084220903424/STEM/954105a4-87d3-44a6-a25b-b70ce3189397.png?resizew=280)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ba3cf741b79264d5b7c25b2fcfa7ce.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720704680206336/2764084220903424/STEM/954105a4-87d3-44a6-a25b-b70ce3189397.png?resizew=280)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bbad902f1e67c0e552f0ef5a8edb44.png)
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6 . 如图,已知
为圆
的直径,点
为线段
上一点,且
,点
为圆
上一点, 且
.
垂直于圆
所在平面,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5478377c-447c-443a-9f27-8dbbbcafa0e0.png?resizew=147)
(1)求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b544ef48ca69eaeabcdbca45249881fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e20c1b7f55cd8e68a7c3aa58bc944c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6578a410d851ffd69a9e5cdc5945eb16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5478377c-447c-443a-9f27-8dbbbcafa0e0.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850319b7098a23b859791d7da3e63e74.png)
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解题方法
7 . 如图,四棱锥
中,
平面
,底面
为直角梯形,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
,
,点
在棱
上,且
,则平面
与平面
的夹角的余弦值为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/70a8de74-304d-4ea1-98c3-805523cfeaf3.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81d99776e84942a7ce7c1033bfed030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5af76a3b6180226a4c87db34c4e49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457c2ee2c0139622d2e5de9a51c106b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/70a8de74-304d-4ea1-98c3-805523cfeaf3.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
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6卷引用:江苏省徐州市铜山区铜北中学2022-2023学年高一下学期3月学情调查数学试题
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