名校
解题方法
1 . 如图,在正四棱柱
中,
,
,
分别是棱
,
的中点,异面直线
与
所成角的余弦值为
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/895b7479-ed58-42b6-8a5a-e2995df70ca5.png?resizew=202)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf04c486321be1e75e79fff14a1f313.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456175ea34492f0bc025aaab668fa659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/895b7479-ed58-42b6-8a5a-e2995df70ca5.png?resizew=202)
A.![]() | B.直线![]() ![]() |
C.![]() | D.直线![]() ![]() |
您最近一年使用:0次
2020-11-30更新
|
1366次组卷
|
15卷引用:湖南省长沙市长郡中学2020-2021学年高二上学期入学考试数学试题
湖南省长沙市长郡中学2020-2021学年高二上学期入学考试数学试题福建省晋江市磁灶中学2022届高三上学期阶段测试(一)数学试题2020届海南省新高考高三线上诊断性测试数学试题(已下线)强化卷10(3月)-冲刺2020高考数学之必拿分题目强化卷(山东专版)(已下线)专题18 立体几何(1)-2020年新高考新题型多项选择题专项训练湖北省武汉市华科附联考体2020-2021学年高二上学期期中数学试题(已下线)练习3 2021年高考数学二轮小题专练(新高考)(已下线)考点46 平面的性质与点线面的位置关系-备战2022年高考数学一轮复习考点帮(新高考地区专用)【学科网名师堂】湖北省武汉外国语学校2021-2022学年高二上学期10月月考数学试题人教A版(2019) 必修第二册 实战演练 第八章 验收检测(已下线)第8章 立体几何初步(单元基础卷)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(已下线)第8章 立体几何初步(单元测试)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)4.3.1 异面直线河南省郑州市新密市矿区中学2022-2023学年高一下学期5月月考数学试题(已下线)第8章 立体几何初步【单元提升卷】-【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)
2 . 如图,长方体
中,
,
,
是
中点,
是
中点.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550017024/STEM/868ab7ae149d4674a169e808803ace64.png)
(Ⅰ)求证:
;
(Ⅱ)求证:平面
⊥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0e44cb429eea46e7ee4320147192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550017024/STEM/868ab7ae149d4674a169e808803ace64.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aebe1feb012fa6b4b84657dea033a4.png)
(Ⅱ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4042e36f20ccd3c1f02c864230e8a277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2095691cd6e3e50722061cbc0bb648.png)
您最近一年使用:0次
3 . 四棱锥
中,侧棱
,底面
是直角梯形,
,且
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550098944/STEM/bf4cbd5428724fbc818b755827741594.png)
(Ⅰ)求异面直线
与
所成的角;
(Ⅱ)线段
上是否存在一点
,使得
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377890137b32fe2ddba89a294ecefad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a642692b7aa9ca1fcdfa8571ffd748a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cae988892b08b67b45153704b2ae2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550098944/STEM/bf4cbd5428724fbc818b755827741594.png)
(Ⅰ)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(Ⅱ)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f245b976825701fad5a04944a2682396.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550098944/STEM/4f1c5a15dc1442a39979fe1ec9ca270c.png)
您最近一年使用:0次