1 . 如图,四棱锥
的底面
是菱形,
,
是
中点,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/cc24d55f-5f26-4284-b251-b5312c1d367f.png?resizew=180)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0453cfd7e92bf7746a88280b9e7b580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/cc24d55f-5f26-4284-b251-b5312c1d367f.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0bd4b30dc777ac9da80f6baa3eb31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4c2641c8643e643ccb75d1fc6d1e06.png)
您最近一年使用:0次
2020-03-17更新
|
749次组卷
|
3卷引用:山西省太原市2019-2020学年高二上学期期末数学(理)试题
名校
2 . 如图所示,在四棱锥
中,
是边长为
的正三角形,点
为正方形
的中心,
为线段
的中点,
.则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/eb446a59-c457-4276-87c6-c6b68c4befc7.png?resizew=197)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4b17ce6e90cd3810a3696262e94c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4999d4fbcbe15f78c29d518f25d317c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/eb446a59-c457-4276-87c6-c6b68c4befc7.png?resizew=197)
A.平面![]() ![]() |
B.直线![]() ![]() |
C.线段![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
2020-03-16更新
|
1282次组卷
|
4卷引用:广东省梅州市2019-2020学年高一下学期期末数学试题
广东省梅州市2019-2020学年高一下学期期末数学试题海南省2019-2020学年高二上学期期末数学试题河北省张家口市第一中学(衔接班)2020-2021学年高二上学期10月月考数学试题(已下线)第2讲 空间向量的应用-2021-2022学年高二数学多选题专项提升(人教A版2019选择性必修第一册)
名校
解题方法
3 . 在三棱锥
中,底面
是等边三角形,侧面
是直角三角形,且
,
,则该三棱锥外接球的表面积为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b49e6f5796ed8f8904dd59564bc6db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d9ef979b9f27a28cbda6923e888ccc.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,四棱锥
中,底面
是正方形,
底面
.
![](https://img.xkw.com/dksih/QBM/2020/3/11/2417271005945856/2417893562458112/STEM/3ddce55118aa4ef98e36eae7960777db.png?resizew=177)
(1)求证:
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/3/11/2417271005945856/2417893562458112/STEM/3ddce55118aa4ef98e36eae7960777db.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03eb62330742830c9feea17037739dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2020-03-12更新
|
1099次组卷
|
3卷引用:广东省深圳市第二高级中学2019-2020学年高一下学期第四学段考试数学试题
名校
解题方法
5 . 已知直线
.
(1)若直线
过点
,且
,求直线
的方程;
(2)若直线
,且直线
与直线
之间的距离为
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874c8b6d20119b333730e63a257a0ea2.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7ee0164b57b5ee701ef467a49ae697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58a838a348e2c32b208db6080f0a603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)若直线
![](https://img.xkw.com/dksih/QBM/2020/3/9/2415736601976832/2415895904174080/STEM/349b558ae60840b28ee3ef7c1ca6f9e3.png?resizew=38)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
您最近一年使用:0次
2020-03-09更新
|
1226次组卷
|
14卷引用:吉林省盟校(东风二中、靖宇中学、通钢一中、白山一中、东辽一高)2018-2019学年高一下学期期中数学试题
吉林省盟校(东风二中、靖宇中学、通钢一中、白山一中、东辽一高)2018-2019学年高一下学期期中数学试题山东省泰安市新泰市新泰中学2020-2021学年高二上学期期中数学试题广东省珠海市第二中学2022-2023学年高二上学期期中数学试题广东省江门市开平市2022-2023学年高二上学期期中考试数学试题山东省济南第一中学2021-2022学年高二上学期期中数学试题海南省三亚市海南中学三亚学校2021-2022学年高二11月期中考试数学试题河南省巩义市重点校2022-2023学年高二上学期第四次考试数学试题山东省济南市济南第三中学2022-2023学年高二上学期期中数学试题福建省晋江市第一中学2022-2023学年高二上学期期中考试数学试题黑龙江省哈尔滨市兆麟中学2023-2024学年高二上学期第一次月考数学试题(已下线)第二章直线与圆的方程单元测试(巅峰版)-【冲刺满分】2023-2024学年高二数学重难点突破+分层训练同步精讲练(人教A版2019选择性必修第一册)福建省厦门市海沧实验中学2023-2024学年高二上学期期中数学试题江西省宜春市宜丰县宜丰中学2023-2024学年高二上学期12月月考数学试题新疆维吾尔自治区喀什地区巴楚县第一中学2023-2024学年高二上学期期末数学试题
名校
解题方法
6 . 已知圆
与直线
交于
两点.
(1)求弦
的长度,扇形
(劣弧部分)的面积;
(2)若
分别是
的终边与圆
的交点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ab11ba6b230c4309e1b899eb58daae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1c7b7ef1eb42fcd98857e07f217726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
(1)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cbd8c9d6841ee3ded51e9c5e9b9018.png)
您最近一年使用:0次
名校
7 . 过直线
上的点
向圆
引一条切线,设切点为
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da4611011375960ede327251150729f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3bcfcc5fdcec676875e253087acc568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce5dcaffd91bc44cda4a2e44000ae73.png)
您最近一年使用:0次
2020-03-01更新
|
644次组卷
|
2卷引用:广东省东莞市高级中学2017-2018学年高一下学期第一次月考数学试题
名校
解题方法
8 . 已知点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15af30ddf96d55604b458d8716da8ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a823fa9b0cfb9ca2669962b65a6e39.png)
,点
在圆
上运动,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15af30ddf96d55604b458d8716da8ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a823fa9b0cfb9ca2669962b65a6e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb50e3bcc32431251722d9390f44da2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2affe4fe1e4f0aa41a50a8f78279f4cd.png)
A.22 | B.26 | C.30 | D.32 |
您最近一年使用:0次
名校
9 . 已知圆
,直线
,则圆
上到直线的距离为
的点的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccb79eddac2ffba071f6e95f4b7be7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3070c679fb57d37e2224c5205fd3812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2020-03-01更新
|
411次组卷
|
2卷引用:广东省东莞市高级中学2017-2018学年高一下学期第一次月考数学试题
解题方法
10 . 如图,在矩形
中,
,
为边
的中点,以
为折痕把
折起,使点
到达点
的位置,且使平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5da9e366-bc01-4e37-8d66-6e8ae8a78fa8.png?resizew=255)
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72518938d15e0ef7cd71c23201948b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c505f9d4513028bb16e274aae96cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5da9e366-bc01-4e37-8d66-6e8ae8a78fa8.png?resizew=255)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b489ed5afdb721bf9973c9089c504eb.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2020-02-28更新
|
420次组卷
|
2卷引用:2020届广东省深圳市罗湖区高三上学期期末质量检测数学文科试题