1 . 如图所示,正方形
所在平面与梯形
所在平面垂直,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/bf980610-b5f1-430b-aa1f-36dc01881773.png?resizew=169)
(1)证明:
平面
;
(2)若点
为线段
上一点,且满足
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d9f2f091410329fc0b1213b842491d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/bf980610-b5f1-430b-aa1f-36dc01881773.png?resizew=169)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7767d492158189b23af332a8016ed37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923764c34a6c4b86b628fff043fb55a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52b0a12e4770a56f6fc747976f4cd7a.png)
您最近一年使用:0次
名校
2 .
,若
,则实数
值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def631f6f4d12c59f640fb69aeb35ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c20dc6950b23bbce793176560988ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2023-12-30更新
|
429次组卷
|
4卷引用:四川省达州市达川区铭仁园学校2023-2024学年高二上学期第四次月考数学试题
四川省达州市达川区铭仁园学校2023-2024学年高二上学期第四次月考数学试题(已下线)专题12 空间向量的坐标表示8种常见考法归类-【寒假自学课】2024年高二数学寒假提升学与练(苏教版2019)(已下线)第6章 空间向量与立体几何 章末题型归纳总结-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)天津市滨海新区塘沽第一中学2023-2024学年高二上学期期末数学练习9
解题方法
3 . 下列函数在定义域上是奇函数且在区间
单调递减的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-12-29更新
|
297次组卷
|
2卷引用:四川省达州外国语学校2023-2024学年高一上学期11月月考数学试题
名校
4 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3070943993936028227fa99e01348f09.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3070943993936028227fa99e01348f09.png)
您最近一年使用:0次
名校
5 . (1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8731113acec5ec789041019c3b8ca3a6.png)
(2)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8731113acec5ec789041019c3b8ca3a6.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bbe7ea044718fb7c2c7774f89bc5d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab39a7c9a0ae0f05d1c1f4dbb1cbffb.png)
您最近一年使用:0次
2023-12-22更新
|
305次组卷
|
2卷引用:四川省达州市万源中学2023-2024学年高一上学期12月月考数学试题
6 . 已知函数
的图象的任意一条对称轴与其相邻的零点之间的距离为
,若将曲线
的图象向左平移
个单位得到的图象关于
轴对称,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4199caa24cc13c82a741d3a727200976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.![]() |
B.![]() |
C.直线![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2023-12-22更新
|
274次组卷
|
2卷引用:四川省达州外国语学校2023-2024学年高一下学期3月月考数学试题
解题方法
7 . 已知
都是正实数,且
.则下列不等式成立的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-12-20更新
|
194次组卷
|
2卷引用:四川省达州外国语学校2023-2024学年高一上学期11月月考数学试题
8 . 计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a3b96326b4c54929ebc9ba909be38f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919d8f74c8d2648142f4c4e9ca42710e.png)
您最近一年使用:0次
解题方法
9 . 记
的三个内角分别为
,
,
,其对边分别为
,
,
,若
,
的面积为
.
(1)求
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faef87744ed2a4d51009b0d52c360cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821309f088a175c00dc0f4828334503d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0bb9e49f8f8a2cd06311bbc45eaadd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d072af2280e2bd3dcf27d012e822e0.png)
您最近一年使用:0次
名校
解题方法
10 . 已知直线
与直线
交于点
.
(1)求过点
且垂直于直线
的直线
的方程;
(2)求过点
并且在两坐标轴上的截距相等的直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2297db3c14c256b9691fbb8e5bba978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b535b292f5156cfb75a4b4953083b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6274852e643a635e7340efa732edddc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
您最近一年使用:0次