1 . 已知空间中两个不同的平面
,
及两条不同的直线
,
,且
,
不垂直,则下列说法正确得是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
2 . 在多面体
中,
,
,
,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/5b41a840-320f-4493-a57b-c970c43693ce.png?resizew=191)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b430e98ea87209da6b3bbda34ea67c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7a42341edbc0b01ab0769c4c02c3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628501936b67eb3d91d355c32c84f5f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/5b41a840-320f-4493-a57b-c970c43693ce.png?resizew=191)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4999d4fbcbe15f78c29d518f25d317c2.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
您最近一年使用:0次
2020-11-23更新
|
331次组卷
|
5卷引用:浙江省绍兴市上虞区2020-2021学年高二上学期竞赛数学试题A组
浙江省绍兴市上虞区2020-2021学年高二上学期竞赛数学试题A组中学生标准学术能力诊断性测试THUSSAT2021届高三诊断性测试 理科数学(一)试题(已下线)第八单元 立体几何(B卷 滚动提升检测)-2021年高考数学(理)一轮复习单元滚动双测卷安徽省阜阳市太和第一中学2020-2021学年高二上学期12月月考理科数学(奥赛班)试题安徽省阜阳市太和第一中学2020-2021学年高二(平行班)上学期12月月考理科数学试题