名校
1 . 如图,已知三棱锥
中,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/23/2490954796163072/2491496351744000/STEM/6565f4af977740869167dfb8de6a8aee.png?resizew=200)
(1)证明:
;
(2)求直线
和平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eebd469dcd6a3b96a4b47215d61d155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef5ee4584144baf0e17a12e14efd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c70a167f1f96583de5f623f608f8535.png)
![](https://img.xkw.com/dksih/QBM/2020/6/23/2490954796163072/2491496351744000/STEM/6565f4af977740869167dfb8de6a8aee.png?resizew=200)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b416412f982d9c6956b2229d6e3729.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2020-06-24更新
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7卷引用:浙江省临海市、乐清市、新昌县2020届高三下学期选考模拟考试数学试题
浙江省临海市、乐清市、新昌县2020届高三下学期选考模拟考试数学试题浙江省台州市书生中学2020届高三下学期高考模拟数学试题山东省济宁市嘉祥县第一中学2020届高三第9次模拟考试数学试题浙江省2021届高三下学期4月高考模拟(6)数学试题浙江省杭州市学军中学2021-2022学年高二上学期期中数学试题(已下线)第35讲 利用传统方法解决立体几何中的角度与距离问题-2022年新高考数学二轮专题突破精练浙江省杭州市临安中学2022届高三下学期仿真模拟数学试题
2 . 如图甲,E是边长等于2的正方形的边CD的中点,以AE、BE为折痕将△ADE与△BCE折起,使D,C重合(仍记为D),如图乙.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/fa404fb9-856e-417c-9dee-415fd29d5324.png?resizew=392)
(1)探索:折叠形成的几何体中直线DE的几何性质(写出一条即可,不含DE⊥DA,DE⊥DB,说明理由);
(2)求二面角D-BE-A的余弦值
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/fa404fb9-856e-417c-9dee-415fd29d5324.png?resizew=392)
(1)探索:折叠形成的几何体中直线DE的几何性质(写出一条即可,不含DE⊥DA,DE⊥DB,说明理由);
(2)求二面角D-BE-A的余弦值
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2020-06-21更新
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777次组卷
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2卷引用:西南名校联盟2020届“3+3+3”高考备考诊断性联考卷(三)数学(理科)试题
名校
3 . 如图所示,圆锥的底面
半径为2,
是圆周上的定点,动点
在圆周上逆时针旋转,设
(
),
是母线
的中点,已知当
时,
与底面所成角为
.
![](https://img.xkw.com/dksih/QBM/2020/6/11/2482562927304704/2483116616933376/STEM/0a82a2ab2979475eb07bf6741d2ac47f.png?resizew=113)
(1)求该圆锥的侧面积;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/bb7e00f8bacce4d649b535449f04568c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8d68c4a9cc22fa13ed89f87a3a57b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0f96c4dfd44a0412601f183a8c7443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4a1df051b975d97c8d278689ee8223.png)
![](https://img.xkw.com/dksih/QBM/2020/6/11/2482562927304704/2483116616933376/STEM/0a82a2ab2979475eb07bf6741d2ac47f.png?resizew=113)
(1)求该圆锥的侧面积;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464e16e3387532eb66521b4e97791cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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2020-06-12更新
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303次组卷
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4卷引用:2020届上海市静安区高三第二次模拟数学试题
2020高一·全国·专题练习
名校
解题方法
4 . 如图,正方体的棱长为1,B′C∩BC′=O,求:
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466968168120320/2467428668538880/STEM/215db9a938b1411eaabc209479fcbe3d.png?resizew=153)
(1)AO与A′C′所成角的度数;
(2)AO与平面ABCD所成角的正切值;
(3)平面AOB与平面AOC所成角的度数.
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466968168120320/2467428668538880/STEM/215db9a938b1411eaabc209479fcbe3d.png?resizew=153)
(1)AO与A′C′所成角的度数;
(2)AO与平面ABCD所成角的正切值;
(3)平面AOB与平面AOC所成角的度数.
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2020-05-21更新
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4卷引用:专题14 立体几何初步复习与检测(知识精讲)-【新教材精创】2019-2020高一数学新教材知识讲学(人教A版必修第二册)-《高中新教材知识讲学》
(已下线)专题14 立体几何初步复习与检测(知识精讲)-【新教材精创】2019-2020高一数学新教材知识讲学(人教A版必修第二册)-《高中新教材知识讲学》安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(理)试题湖北省荆州市沙市第四中学2020-2021学年高二上学期11月阶段性测试数学试题江西省丰城中学2022-2023学年高一(创新班)上学期期中考试数学试题
名校
解题方法
5 . 如图,在四边形
中,
,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
平面
;
(2)若
为
的中点,二面角
等于60°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad2d7c7a8177255f745b3b8101b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
您最近一年使用:0次
2020-05-12更新
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1706次组卷
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8卷引用:2020届山东省聊城市高三高考模拟(一)数学试题
名校
6 . 如图,将斜边长为
的等腰直角
沿斜边
上的高
折成直二面角
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/e5f424df-b202-48d3-91b5-9644ed407202.png?resizew=287)
(1)求二面角
的余弦值;
(2)
为线段
上一动点,当直线
与平面
所成的角最大时,求三棱锥
外接球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29cc627d76412c236aac6b29fa0fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/e5f424df-b202-48d3-91b5-9644ed407202.png?resizew=287)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486aa57b8d51f4bafedf8b31ed0b6452.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5452197f58d5f1b8e377d0f79069fbc.png)
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2020-04-27更新
|
1185次组卷
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4卷引用:2020届百校联盟高三4月教育教学质量监测考试(全国Ⅰ卷) 数学(理)试题
2020届百校联盟高三4月教育教学质量监测考试(全国Ⅰ卷) 数学(理)试题(已下线)考点24 空间几何体体积及表面积(练习)-2021年高考数学复习一轮复习笔记江苏省泰州市靖江市斜桥中学2020-2021学年高三上学期12月阶段性检测数学试题江西省吉安市泰和中学2022-2023学年高一下学期7月月考数学试题
名校
解题方法
7 . 如图,平面四边形
中,
,
是
上的一点,
是
的中点,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438658448515072/2438703586320384/STEM/6732a41e099a4ed080f9274d1e0a3f60.png?resizew=231)
(1)证明:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8733b30da7e9d6adb3fc88bcaadd66.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/1dd0914af19ae7dedcaaf2929d957750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de45ac66b578458f26a6a28db6eebe54.png)
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438658448515072/2438703586320384/STEM/6732a41e099a4ed080f9274d1e0a3f60.png?resizew=231)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c26f7a112f96b85deceae436a21388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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2020-04-10更新
|
587次组卷
|
4卷引用:2020届湘赣皖十五校高三下学期第一次联考模拟数学(理)试题
2020届湘赣皖十五校高三下学期第一次联考模拟数学(理)试题河南省五市2023届高三二模数学试题(理)河南省三门峡市湖滨区等5地2023届高三第三次大练习数学(理)试题(已下线)四川省成都市第七中学2024届高三一模数学(理)试题
名校
8 . 如图,四棱锥P-ABCD的底面是正方形,E为AB的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee92e5d20f0583f559561ec83d32809.png)
(1)证明:
平面PCD.
(2)求DA与平面PCE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee92e5d20f0583f559561ec83d32809.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/3b4463a8-09af-4566-9164-bb054be11c5d.png?resizew=135)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)求DA与平面PCE所成角的正弦值.
您最近一年使用:0次
2020-03-24更新
|
745次组卷
|
7卷引用:2020届海南省新高考高三线上诊断性测试数学试题
9 . 如图,在长方体ABCD-A1B1C1D1中,E,F分别为AB,A1C的中点,且AA1=
AD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/08f4169e-25d2-4848-a542-7d61c2787da1.png?resizew=194)
(1)求直线EF与平面ABCD所成角的大小;
(2)若EF=
AB,求二面角B-A1C-D的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/08f4169e-25d2-4848-a542-7d61c2787da1.png?resizew=194)
(1)求直线EF与平面ABCD所成角的大小;
(2)若EF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8b45edad1f59a7454739675fd2de55.png)
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2020-03-18更新
|
207次组卷
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2卷引用:江苏省南通市启东中学2019-2020学年高二下学期期初数学试题
解题方法
10 . 如图,已知三棱锥
的侧棱
两两垂直,且
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/636a8785-8240-4b90-9863-5ef0cb4c8904.png?resizew=236)
(1)求异面直线
与
所成角的余弦值;
(2)求AE和平面
的所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062a6c770f46e26ddb71be180d05a63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40c32481c8ff2ea94234d8491244d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/636a8785-8240-4b90-9863-5ef0cb4c8904.png?resizew=236)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求AE和平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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