名校
1 . 下列命题不正确的有( )
A.复数![]() ![]() |
B.若非零向量![]() ![]() ![]() |
C.在![]() ![]() ![]() |
D.底面是正多边形的棱锥是正棱锥 |
您最近一年使用:0次
2 . 如图,在正方体
中,
在棱
上,
,平行于
的直线
在正方形
内,点
到直线
的距离记为
,记二面角为
为
,已知初始状态下
,
,则( )
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721736974172160/2724289797496832/STEM/f84fcd4b-2e4f-49be-8965-2ea8f30191ea.png?resizew=260)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a0c3a4e61b97fa9bc58f3179fc2958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a666403569e607f32af5f762c246dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6fc4f2fb4cb73db222591261f2d7bd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fa64abb0036dbff6a29f01b0c03899.png)
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721736974172160/2724289797496832/STEM/f84fcd4b-2e4f-49be-8965-2ea8f30191ea.png?resizew=260)
A.当![]() ![]() | B.当![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() |
您最近一年使用:0次
2021-05-19更新
|
2649次组卷
|
9卷引用:浙江省数海漫游2021届高三下学期第二次模拟考试数学试题
浙江省数海漫游2021届高三下学期第二次模拟考试数学试题(已下线)专题9.立体几何与空间向量 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》浙江省2022届高三下学期高考冲刺卷(一)数学试题(已下线)考向36 立体几何中的向量方法(已下线)考点35 立体几何中的综合问题-备战2022年高考数学典型试题解读与变式(已下线)专题23 立体几何中的压轴小题-2(已下线)第一章 空间向量与立体几何(压轴题专练,精选20题)-2023-2024学年高二数学单元速记·巧练(人教A版2019选择性必修第一册)(已下线)专题14 立体几何常见压轴小题全归纳(9大核心考点)(讲义)(已下线)第二章 立体几何中的计算 专题二 空间距离 微点1 两点间的距离、点到直线的距离【基础版】
解题方法
3 . 如图,将矩形纸片
折起一角落
得到
,记二面角
的大小为
,直线
,
与平面
所成角分别为
,
,则( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/27a9990c-b038-4f1c-8831-aa48eeba122b.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3088531846a64e4cd0df311bf88ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad36873715682f5b9808ae7abb51b0b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81dbaa7f82b99805eb4e47e3de199e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef46463d76374c018d0643033f3f846b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968b886a9f161fdcab1e08cba8ece5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71fe246270d1277f9eb2bf15af22e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/27a9990c-b038-4f1c-8831-aa48eeba122b.png?resizew=169)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次