1 . 如图,在正三棱柱
中,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/35822725-e0a2-4ae1-ad5b-cdb62e28f249.png?resizew=153)
(Ⅰ)求证:
平面
;
(Ⅱ)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/35822725-e0a2-4ae1-ad5b-cdb62e28f249.png?resizew=153)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2dcb6f96358623223b25190b25c8333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
您最近一年使用:0次
2019-04-24更新
|
275次组卷
|
2卷引用:【市级联考】辽宁省抚顺市2019届高三第一次模拟考试数学(理)试题
2 . 如图,在四棱锥P-ABCD中,PA⊥平面ABCD,底面ABCD是等腰梯形,AD∥BC,AC⊥BD.
![](https://img.xkw.com/dksih/QBM/2019/4/17/2184348365021184/2184928710541312/STEM/0683a65d-5739-4494-b8f0-6e59c439fec1.png?resizew=200)
(1)证明:BD⊥PC;
(2)若AD=4,BC=2,设AC∩BD=O,且∠PDO=60°,求四棱锥P-ABCD的体积.
![](https://img.xkw.com/dksih/QBM/2019/4/17/2184348365021184/2184928710541312/STEM/0683a65d-5739-4494-b8f0-6e59c439fec1.png?resizew=200)
(1)证明:BD⊥PC;
(2)若AD=4,BC=2,设AC∩BD=O,且∠PDO=60°,求四棱锥P-ABCD的体积.
您最近一年使用:0次
3 . 如图,等腰梯形
中,
,
,
为
中点,将
沿
折到
的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/37f16ff2-ad13-43a6-861b-e9d4b72292c6.png?resizew=303)
证明:
;
当四棱锥
的体积最大是,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4de56968f6aae60c86d7fe219e3ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/37f16ff2-ad13-43a6-861b-e9d4b72292c6.png?resizew=303)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59b789322b7731dad894a9246c5022e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bb66960d8c1a7ec3efd1e57963b503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeadd146662b5d8fe14a424138ef751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2ed7474932ac3959108f2b835acf98.png)
您最近一年使用:0次
2019-04-16更新
|
515次组卷
|
2卷引用:【市级联考】东北三省四市2019届高三第一次模拟数学(理)试题1
4 . 如图,直三棱柱
中,点
是棱
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/41615150-12de-4610-9464-4fe6c74d2efa.png?resizew=140)
(Ⅰ)求证:
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e486a1aad96167ff62f6fb5136e0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e5a6afab22d5b53c1d8e87d58e8020.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/41615150-12de-4610-9464-4fe6c74d2efa.png?resizew=140)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
您最近一年使用:0次
5 . 如图,直三棱柱
中,点
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/920532ba-3234-40f0-9521-94c4b7737f52.png?resizew=145)
(Ⅰ)求证:
平面
;
(Ⅱ)若
,
,在棱
上是否存在点
,使二面角
的大小为
,若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/920532ba-3234-40f0-9521-94c4b7737f52.png?resizew=145)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e486a1aad96167ff62f6fb5136e0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e5a6afab22d5b53c1d8e87d58e8020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afe71e19e4c6ff9c07ebcc3ac3dc8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7548af7d7555b78aef2999e7ea02d7c2.png)
您最近一年使用:0次
2019-04-14更新
|
585次组卷
|
3卷引用:【校级联考】东北三省三校(哈尔滨师大附中、东北师大附中、 辽宁省实验中学)2019届高三第二次模拟数学(理)试题
6 . 在如图所示的几何体中,已知
,
平面ABC,
,
,
若M是BC的中点,且
,
平面PAB.
求线段PQ的长度;
求三棱锥
的体积V.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd84de828fe646996ba099b6ecf14a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4d5332664bede4c408d3226c691ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455849c5c8380375c5ebc02603d79d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6219af0c40543e3d8201ec2d0dbcc1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7adfe75d60874c944799ba9ffee14b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea996bc916199317b8f862c5cbeeb3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405a2a5a1df81357e680fee07deba7a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2decae5237bbf43b52e1e134a1ba9203.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/74c5f6ea-7c54-471a-8a61-eabdbb8a3f9a.png?resizew=172)
您最近一年使用:0次
2019-04-07更新
|
2329次组卷
|
6卷引用:2019届辽宁省实验中学高三模拟考试数学(文)试题
2019届辽宁省实验中学高三模拟考试数学(文)试题【市级联考】四川省宜宾市2019届高三上学期第一次诊断测试数学(文)试题安徽省六安市第一中学2019-2020学年高二上学期开学考试数学(文)试题2020届全国100所名校高三模拟金典卷文科数学(三)试题(已下线)专题08 立体几何中线段与面积等求解问题(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖四川省成都外国语学校、成都实验外国语学校联合考试2021届高三第一学期11月月考文科数学试题
7 . 如图,直三棱柱
中,
,
,
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6fd96dce-f6c6-44cc-9bed-70b49608ca70.png?resizew=156)
(1)证明:
平面
;
(2)若
平面
,求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3509e256c6cf369938d60851bd7673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0236d9dea89acb35d88f0857b38dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98842968c75427c940b34de391a3a778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c640abbdc470479407da1ae2aa80fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675c6e2941eecb64b358527da4d4999c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6fd96dce-f6c6-44cc-9bed-70b49608ca70.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7440b41636c761b0910639e310ff7dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a6b40391f8aa6663f20ea4f96f3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b49f9378049827c8c2a28273cf91727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
您最近一年使用:0次
2019-04-06更新
|
390次组卷
|
2卷引用:【市级联考】辽宁省丹东市2019届高三总复习质量测试(一)文科数学试题
8 . 已知平面多边形
中,
,
,
,
,
,
为
的中点,现将三角形
沿
折起,使
.
![](https://img.xkw.com/dksih/QBM/2019/4/3/2174657161592832/2175046451142656/STEM/3d932cf779404a469041d7b9e96a8c5c.png?resizew=378)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6698d3452602370e219ec33b4882441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de61b2fc12547b742acb0746899ddea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66cef506a91c5e28723f6f19895c27b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7a937699f989b685f285041434000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ced8225ff27c8e3e1897b8629312d5.png)
![](https://img.xkw.com/dksih/QBM/2019/4/3/2174657161592832/2175046451142656/STEM/3d932cf779404a469041d7b9e96a8c5c.png?resizew=378)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95e78927443bbadb5bf60f1c836ea24.png)
您最近一年使用:0次
2019-04-04更新
|
881次组卷
|
4卷引用:辽宁省大连市第二十四中学2020届高三6月高考模拟(最后一模)数学(文)试题
9 . 如图,在四棱锥
中,底面
为菱形,
,
,
为线段
的中点,
为线段
上的一点.
平面
.
(2)若
,二面角
的余弦值为
,求
与平面
所成角的正弦值.
![](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/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c383691e8d740830a865b12d66f7633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b489c25405ce48699d4f0a62820bed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8738736d32c30a919fba2b5f5926f3b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af87eb26942c14c12c35f8258621c5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2019-04-01更新
|
2461次组卷
|
13卷引用:【市级联考】辽宁省辽阳市2019届高三下学期一模数学(理科)试题
【市级联考】辽宁省辽阳市2019届高三下学期一模数学(理科)试题【市级联考】广西南宁市2019届高三毕业班第一次适应性测试数学(理科)试题安徽省皖西南联盟2018-2019学年高二下学期期末联考数学(理)试题安徽省浮山中学等重点名校2018-2019学年高二下学期期末联考数学(理)试题人教A版(2019) 选择性必修第一册 第一章 空间向量与立体几何 单元测试河北省石家庄五校联合体2021届高三上学期12月质量检测数学试题陕西省西安市长安区第一中学2020-2021学年高三上学期第二次月考数学(理)试题广东省清远市清新一中2021届高三下学期3月模拟数学试题北京市海淀区2021届高三模拟试题(一)河南省新乡市2020届高三上学期调研考试数学(理)试题湖南省娄底市娄星区2020-2021学年高二下学期期中数学试题吉林省四校联考2023-2024学年高二上学期10月月考数学试题吉林省长春市十一高中等四校联考2023-2024学年高二上学期第一次月考数学试题
名校
10 . 已知圆
的圆心
在直线
上,且与
轴正半轴相切,点
与坐标原点
的距离为
.
(Ⅰ)求圆
的标准方程;
(Ⅱ)斜率存在的直线
过点
且与圆
相交于
两点,求弦长
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(Ⅰ)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)斜率存在的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550dee2b8e6a03b564e4d4bb1731b923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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2019-03-22更新
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846次组卷
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3卷引用:【市级联考】辽宁省大连市2019年普通高中学生学业水平考试模拟数学试题