1 . 如图,在梯形ABCD中,
,四边形ACFE为矩形,平面ACFE⊥平面ABCD,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/41a92cf5-ca25-4dbd-bbda-af584419dcf0.png?resizew=127)
(1)求证:EF⊥平面BCF;
(2)求平面FAB与平面FCB夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52126f9244ab1937adcb0c6ac9758c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ecd88c2639c31455aad87769700b2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/41a92cf5-ca25-4dbd-bbda-af584419dcf0.png?resizew=127)
(1)求证:EF⊥平面BCF;
(2)求平面FAB与平面FCB夹角的余弦值.
您最近一年使用:0次
2022-04-14更新
|
575次组卷
|
3卷引用:陕西省渭南市2022届高三下学期二模理科数学试题
陕西省渭南市2022届高三下学期二模理科数学试题(已下线)回归教材重难点03 空间向量与立体几何-【查漏补缺】2022年高考数学(理)三轮冲刺过关2023版 湘教版(2019) 必修第二册 过关斩将 第4章 4.4 平面与平面的位置关系 4.4.2 平面与平面垂直
名校
2 . 如图,四边形
是一个半圆柱的轴截面,E,F分别是弧
上的一点,
,点H为线段
的中点,且
,点G为线段
上一动点.
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955351100211200/2956804800987136/STEM/f144479a-0c0f-4b8d-ad65-7ed3f1771c77.png?resizew=131)
(1)试确定点G的位置,使
平面
,并给予证明;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217ef4133057ffd2a3b1a2da7c59045a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfffc4b756bd8b93304efc27c3d7b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3265e74e4aae8ebbe152f66d5fa657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955351100211200/2956804800987136/STEM/f144479a-0c0f-4b8d-ad65-7ed3f1771c77.png?resizew=131)
(1)试确定点G的位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26dee2a75ce2b52cdceefc5e863ac5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630a21ba7a8e1b8bca73c1634cc6f74d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6e5be6a104d1530ac8f009cc4acefb.png)
您最近一年使用:0次
2022-04-12更新
|
2280次组卷
|
5卷引用:江西省宜春市2022届高三4月模拟考试数学(理)试题
名校
3 . 在四棱锥
中,四边形
为平行四边形,
是等边三角形,
.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953169832894464/2953837841997824/STEM/cda6fee07b0f4f74b05fd61f99920647.png?resizew=252)
(1)证明:
;
(2)若
,
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae61c349e28cdf8e2f63f6787e6de875.png)
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953169832894464/2953837841997824/STEM/cda6fee07b0f4f74b05fd61f99920647.png?resizew=252)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d27dc977cc717bb4958683f9c87de6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d190eae714be0f9007a75eeea42602b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50f0df4df850901f76cfbd91b204d6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d639bc8b486be1176e595f82511f50.png)
您最近一年使用:0次
2022-04-08更新
|
519次组卷
|
3卷引用:四川省达州市2022届高三第二次诊断性测试理科数学试题
4 . 菱形
中,
,
与
交于
,
平面
,
平面
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b954b29e9ba4c32d41a694e9516caa0.png)
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952475869536256/2953109906522112/STEM/6841b640332649b1aaf3a26a6f3d1149.png?resizew=193)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a6b40391f8aa6663f20ea4f96f3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a277db452e76240ec83ec6a2864bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b954b29e9ba4c32d41a694e9516caa0.png)
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952475869536256/2953109906522112/STEM/6841b640332649b1aaf3a26a6f3d1149.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147310251a463539f66374c1f452fb67.png)
您最近一年使用:0次
5 . 如图①,平面图形ABCDE中,
,四边形BCDE是等腰梯形,
,
.沿BE将△ABE折起,使平面
平面BCDE,得到四棱锥
,连接CE,如图②.
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949403084152832/2950299002044416/STEM/a922f41e-901b-4e4f-b042-af9c1a85f3d3.png?resizew=415)
(1)设平面ABC与平面ADE的交线为l,求证:
;
(2)当四棱锥
的体积为
时,求侧面ACD与侧面ABE所成的二面角的平面角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4dc4d7d30af1cdce660795e0fd7d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9fd76d8997e3b2db7d9cb9b72d0f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624d4c516446f16aecc48bd5b2ef2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949403084152832/2950299002044416/STEM/a922f41e-901b-4e4f-b042-af9c1a85f3d3.png?resizew=415)
(1)设平面ABC与平面ADE的交线为l,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6411dec63998be60c272d5367e84a6a3.png)
(2)当四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4700efcb84c4027ce7a50af0d5212fc.png)
您最近一年使用:0次
6 . 如图,在直三棱柱
中,
是以
为斜边的等腰直角三角形,
,点
,
分别为棱
,
上的点,且
.
![](https://img.xkw.com/dksih/QBM/2022/3/31/2948082186780672/2950126547451904/STEM/782e0055-9192-438e-9147-b044c082304a.png?resizew=151)
(1)若
,求证:
平面
;
(2)若二面角
的大小为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa9b21f2ced83bb01e9dbef94edec4d.png)
![](https://img.xkw.com/dksih/QBM/2022/3/31/2948082186780672/2950126547451904/STEM/782e0055-9192-438e-9147-b044c082304a.png?resizew=151)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129ddd2ea97fd010b9e0b644225da8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f25c5543b39190dc2499aa66f939659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解题方法
7 . 如图,在三棱锥
中,
和
均是边长为4的等边三角形.
是棱
上的点,
,过
的平面
与直线
垂直,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/2022/3/31/2948126248697856/2950053674131456/STEM/ac605f5bd980499b8b395a3737b50d37.png?resizew=259)
(1)在图中画出
,写出画法并说明理由;
(2)若直线
与平面
所成角的大小为
,求过
及点
的平面与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f63075fdeeb9e765dd696c4ff43ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d03c95a1e2e43a0b6a9992e83b8a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a392d05d3cfcbb438569b1ea9980dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670684ed4962fcebce7b5a140510d066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863dd235346ce076540230e8eb4122f7.png)
![](https://img.xkw.com/dksih/QBM/2022/3/31/2948126248697856/2950053674131456/STEM/ac605f5bd980499b8b395a3737b50d37.png?resizew=259)
(1)在图中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a392d05d3cfcbb438569b1ea9980dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
8 . 如图,在四棱锥
中,底面
满足
平面
,且
.
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872422041985024/2948680346017792/STEM/5e8825be67364788b6fbf7f7629eb568.png?resizew=184)
(1)证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d101cd311efd7e9cf066eb7a4136313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2adb8e53cd26c16216a001eeb84dc7e7.png)
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872422041985024/2948680346017792/STEM/5e8825be67364788b6fbf7f7629eb568.png?resizew=184)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
您最近一年使用:0次
2022-04-01更新
|
412次组卷
|
2卷引用:安徽省六安中学2021-2022学年高二上学期期中理科数学试题
9 . 已知长方体AC1中,棱AB=BC=3,棱BB1=4,连接B1C,过B点作B1C的垂线交CC1于E,交B1C于F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/d9b6730e-2f8c-4ffc-b4c8-6986dafbcf3a.png?resizew=176)
(1)求证A1C⊥平面EBD;
(2)求二面角B1—BE—A1的正切值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/d9b6730e-2f8c-4ffc-b4c8-6986dafbcf3a.png?resizew=176)
(1)求证A1C⊥平面EBD;
(2)求二面角B1—BE—A1的正切值.
您最近一年使用:0次
10 . 已知四棱锥
中,
,
平面
,点
为
三等分点(靠近
点),
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770215813120/2947907939516416/STEM/538954bc-3d32-4d0b-9b56-cf0f84987aa4.png?resizew=192)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958f880eccc0a0e15aefc54078d8aa2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac192cfba38bf0e2df0c2d490596aa65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd92e5c56c1b76dd3811108f2cc1286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88870519c473fb6fb36b5a88a42df24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4280be91682e5d8a0d0704190319bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ae98eb223b4fe33e53e9d3ba4cc40.png)
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770215813120/2947907939516416/STEM/538954bc-3d32-4d0b-9b56-cf0f84987aa4.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade8233bc5e455bc00825e081647519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632854d063d897c2b4df9551098118e9.png)
您最近一年使用:0次