1 . 如图,在直三棱柱ABC﹣A1B1C1中,∠BAC=90°,AB=AC=AA1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/68830015-a59f-4b0a-a322-6dca3755fd59.png?resizew=174)
(1)求证:AB1⊥平面A1BC1;
(2)若D在B1C1上,满足B1D=2DC1,求AD与平面A1BC1所成的角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/68830015-a59f-4b0a-a322-6dca3755fd59.png?resizew=174)
(1)求证:AB1⊥平面A1BC1;
(2)若D在B1C1上,满足B1D=2DC1,求AD与平面A1BC1所成的角的正弦值.
您最近一年使用:0次
2 . 由四棱柱
截去三棱锥
后得到的几何体如图所示,四边形
是边长为
的正方形,
为
与
的交点,
为
的中点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b25e25e1-75ae-4dce-a576-ccec34c4b7ef.png?resizew=258)
(Ⅰ)证明:
平面
;
(Ⅱ)若直线
与平面
所成的角为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d236e214b4cb2ed4a914166280c6841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4525c00ed908bed8ba8d353e747a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b25e25e1-75ae-4dce-a576-ccec34c4b7ef.png?resizew=258)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ade405849474f527af4d0d407066f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
(Ⅱ)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc526324e78e4d9226d1b537f27845a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
您最近一年使用:0次
3 . 已知四棱锥
中,底面
为矩形,平面
平面
,
,点
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/2a4e0cf8-cf1c-44dc-9aaa-f83d5391422c.png?resizew=158)
(1)求证:
平面
;
(2)若
与平面
所成角的正弦值等于
,求
的长.
![](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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931bbffda5e872703c9947eccc47ede2.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/2a4e0cf8-cf1c-44dc-9aaa-f83d5391422c.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee72fd8a5a52d08a4fddcf0830a8e103.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42621cd6793e7f3673fdb49bc3123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2020-02-01更新
|
1813次组卷
|
2卷引用:2020届浙江省绍兴市诸暨市高三上学期期末数学试题
解题方法
4 . 如图,在四棱锥E-ABCD中,底面ABCD为正方形,
平面CDE.已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a2443be4-7357-4a6f-a3e2-1274d1a7d0c8.png?resizew=161)
(1)证明:平面
平面ABCD;
(2)求直线BE与平面ACE所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb55961fe96e155242d18d98e5c2261.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a2443be4-7357-4a6f-a3e2-1274d1a7d0c8.png?resizew=161)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
(2)求直线BE与平面ACE所成的角的正弦值.
您最近一年使用:0次
解题方法
5 . 如图,在底面是菱形的四棱锥
中,E为CD中点,
,
,已知
.
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445375000207360/2445598412832768/STEM/4c574dde98834b5491193c318af909c8.png?resizew=166)
(1)证明:
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f67538eedbdf54a1bcaff4394230e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c161375e4e6f61f1cbef8083c02e975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9130c55378512b2615ff6e86b03b1cec.png)
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445375000207360/2445598412832768/STEM/4c574dde98834b5491193c318af909c8.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f45265eaed2ba5fc08f6a112a02cd2.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8981acad5791c9037b86779e4d8323.png)
您最近一年使用:0次
名校
6 . 在四面体
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/397463ed-094c-4b40-bf2f-1565ae5161a7.png?resizew=254)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)设P是
中点,点Q在线段
上,若直线
与平面
所成角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f1edbd9569a4206717e86099d6390e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46571701ccaa18d3c844ab99ee6c30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/397463ed-094c-4b40-bf2f-1565ae5161a7.png?resizew=254)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)设P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80dbac2006d30c49943f0241fd976eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a4eae6cd9bd7c514e6298ddcf81001.png)
您最近一年使用:0次
2020-04-17更新
|
433次组卷
|
2卷引用:2019届浙江省慈溪中学高三下学期高考适应性测试数学试题
名校
解题方法
7 .
是正四面体
的面
内一动点,
为棱
中点,记
与平面
成角为定值
,若点
的轨迹为一段抛物线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-12更新
|
280次组卷
|
2卷引用:2019届浙江省绍兴市诸暨中学高三第一次新高考模拟数学试题
8 . 已知四棱柱
的底面为菱形,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/324a68eb-6832-4cc9-83ab-c08c392ff6ea.png?resizew=204)
(1)证明:
平面
;
(2)求钝二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd6edf5b50fea3628f602f397ceafcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/324a68eb-6832-4cc9-83ab-c08c392ff6ea.png?resizew=204)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求钝二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104bf24922707215be95a860cd533940.png)
您最近一年使用:0次
2019-12-27更新
|
1450次组卷
|
9卷引用:浙江省2021届高三高考数学预测卷(一)
浙江省2021届高三高考数学预测卷(一)山东省九校2019-2020学年高三上学期12月检测数学试题(已下线)卷07-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》(已下线)专题15 运用空间向量研究立体几何问题-2021年高考数学二轮优化提升专题训练(新高考地区专用)【学科网名师堂】(已下线)专题23 盘点空间面面角的问题——备战2022年高考数学二轮复习常考点专题突破山东省东营市第一中学2022-2023学年高三上学期期末数学试题新疆乌鲁木齐市第八中学2020-2021学年高二下学期第一阶段考试数学(理)试题福建省泉州第一中学2021-2022学年高二上学期期中考试数学试题重庆市荣昌中学2023-2024学年高二上学期第一次月考数学试题
9 . 如图,已知
中,
,点
平面
,点
在平面
的同侧,且
在平面
上的射影分别为
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/0b912f08-2dd5-4c22-b64e-9cf59bac86e6.png?resizew=183)
(Ⅰ)求证:平面
平面
;
(Ⅱ)若
是
中点,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ff5d97b2e37a3758bc9f353e23be32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70051411f2fbba74fb4fe1b01aeb758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bc45ba4c2ad98835bfdd40c2212ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5ba648f51428835d46501480dc6874.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/0b912f08-2dd5-4c22-b64e-9cf59bac86e6.png?resizew=183)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c5ef850e256c98ca4f033999e61311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
10 . 如图,在四棱锥
中,底面ABCD为梯形,AB//CD,
,AB=AD=2CD=2,△ADP为等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/1fa763ef-291b-4411-ab79-db2ac3e76738.png?resizew=164)
(1)当PB长为多少时,平面
平面ABCD?并说明理由;
(2)若二面角
大小为150°,求直线AB与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/1fa763ef-291b-4411-ab79-db2ac3e76738.png?resizew=164)
(1)当PB长为多少时,平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911b404bbb8f8d5f1470585fa31ad97.png)
您最近一年使用:0次
2019-06-18更新
|
2688次组卷
|
8卷引用:浙江省台州一中2019-2020学年高三上学期期中数学试题
浙江省台州一中2019-2020学年高三上学期期中数学试题【市级联考】山东省烟台市、菏泽市2019届高三5月高考适应性练习(一)理科数学试题河北省承德第一中学2020届高三9月月考数学试题(理)河南省郑州市第一中学2019-2020学年高三上学期12月月考数学(理)试题黑龙江省牡丹江市第一高级中学2019-2020学年高三上学期12月月考数学(理)试题(已下线)黄金卷02-【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(山东高考专用)人教A版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 本章达标检测(已下线)第一章 空间向量与立体几何(本章达标检测试卷)-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)