名校
解题方法
1 . 如图,已知四棱锥
的侧棱
底面
,且底面
是直角梯形,
,
,
,
,
,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/233c7ece-a86d-42ae-b716-e1158903937f.png?resizew=205)
(1)证明:
平面
.
(2)求直线
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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc28e69c1ba0aac981256887f7dfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430b77d8d2a99713b192dc729ddc2275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257a812d37c047e69a2f47c94c0c47f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/233c7ece-a86d-42ae-b716-e1158903937f.png?resizew=205)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2020-03-09更新
|
1900次组卷
|
3卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(理)试题
2020届吉林省梅河口市第五中学高三11月月考数学(理)试题山西省运城市2019-2020学年高二上学期期中数学(理)试题(已下线)考点25 几何法解空间角(讲解)-2021年高考数学复习一轮复习笔记
名校
解题方法
2 . 已知四棱锥
中,
平面ABCD,
,
,M分别是线段PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/c0a159b0-b5b6-486b-b8e7-6b17f16e550b.png?resizew=150)
(1)在线段AB上找出一点N,使得平面
平面PAD,并给出证明过程;
(2)若PC和平面PAD所成的角为
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8447855e535c61ab52386f21e8d88f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929d467300252d809d8c88e4885bc7b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/c0a159b0-b5b6-486b-b8e7-6b17f16e550b.png?resizew=150)
(1)在线段AB上找出一点N,使得平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e5ec7123a46ae370c2bbdf92dd49e1.png)
(2)若PC和平面PAD所成的角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15416b74b2ecbcfa38cf34a9ffff730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b3e7ce4361c85a87c73a3e43011a02.png)
您最近一年使用:0次
名校
3 . 如图,在四棱锥
中,底面
是菱形,
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/c69525e3-6ae6-4cd1-8f83-2fe76dc30ceb.jpg?resizew=186)
(Ⅰ)证明:
;
(Ⅱ)若
,求直线
与平面
所成角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/c69525e3-6ae6-4cd1-8f83-2fe76dc30ceb.jpg?resizew=186)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31df548232e561880464caad82dad113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
解题方法
4 . 已知四棱锥
的底面是边长为1的正方形,
,E为PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/80d2b912-4ffc-4cd5-9c7f-4e1ecb6c9849.png?resizew=165)
(1)证明:
;
(2)求直线AP与平面ADE所成角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aacd7a620b69756ae0c82306be5dc18d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/80d2b912-4ffc-4cd5-9c7f-4e1ecb6c9849.png?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)求直线AP与平面ADE所成角.
您最近一年使用:0次
名校
解题方法
5 . 如图①,是由矩形
,
和
组成的一个平面图形,其中
,
,将其沿
折起使得
重合,连接
如图②.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/8442f118-fd70-4ab4-9377-212ae5a5bf0c.png?resizew=347)
(1)证明:平面
平面
;
(2)若
为线段
中点,求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f0ab7952483e00b97cb9d8d8e8edcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7269e2c199802cbddb99a6070d39d2fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4840aae24af2fb3f47eb96c99fbc8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f45c6b93a871dc4dd5e66a9bfdecd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b2085b833fb31b7e38cb16f1fce3ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/8442f118-fd70-4ab4-9377-212ae5a5bf0c.png?resizew=347)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7fb4bb4caccf79639a126064771da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
(2)若
![](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/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
您最近一年使用:0次
名校
解题方法
6 . 在四棱锥
中,底面是边长为
的菱形,对角线
与
相交于点
,
,
平面
,平面
与平面
所成的角为45°,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/43c1b69f-2949-4db8-9976-b44038b16f7b.png?resizew=216)
(1)证明:平面
平面
;
(2)求异面直线
与
所成角的余弦值;
(3)求直线
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/61128ab996360a038e6e64d82fcba004.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/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/43c1b69f-2949-4db8-9976-b44038b16f7b.png?resizew=216)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
7 . 如图,斜三棱柱
中,平面
平面
,
为棱
的中点,
与
点
.若
,
60°.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc5d0e57-b297-4547-b9a5-a2cf0fc5c389.png?resizew=264)
(Ⅰ)证明:直线
平面
;
(Ⅱ)证明:平面
平面
;
(Ⅲ)求直线
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/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d1a93dd42f32815f2ca2e126612623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765ed8ef8bd23caece9652f5e1a547fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc5d0e57-b297-4547-b9a5-a2cf0fc5c389.png?resizew=264)
(Ⅰ)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af142a6050b54e8b5777a085d4597481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(Ⅱ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
(Ⅲ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
名校
8 . 已知三棱锥P﹣ABC(如图一)的平面展开图(如图二)中,四边形ABCD为边长等于
的正方形,△ABE和△BCF均为正三角形,在三棱锥P﹣ABC中:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/54a2892f-7640-4bf6-b39d-9632b925dce3.png?resizew=336)
(1)证明:平面PAC⊥平面ABC;
(2)若点M在棱PA上运动,当直线BM与平面PAC所成的角最大时,求三棱锥M﹣ABC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/54a2892f-7640-4bf6-b39d-9632b925dce3.png?resizew=336)
(1)证明:平面PAC⊥平面ABC;
(2)若点M在棱PA上运动,当直线BM与平面PAC所成的角最大时,求三棱锥M﹣ABC的体积.
您最近一年使用:0次
9 . 如图1,ABCD为菱形,∠ABC=60°,△PAB是边长为2的等边三角形,点M为AB的中点,将△PAB沿AB边折起,使平面PAB⊥平面ABCD,连接PC、PD,如图2,
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374139253850112/2374934092824576/STEM/bb68959d-48fa-4e96-9181-d77cd8f8fa48.png)
(1)证明:AB⊥PC;
(2)求PD与平面ABCD所成角的正弦值
(3)在线段PD上是否存在点N,使得PB∥平面MNC?若存在,请找出N点的位置;若不存在,请说明理由
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374139253850112/2374934092824576/STEM/bb68959d-48fa-4e96-9181-d77cd8f8fa48.png)
(1)证明:AB⊥PC;
(2)求PD与平面ABCD所成角的正弦值
(3)在线段PD上是否存在点N,使得PB∥平面MNC?若存在,请找出N点的位置;若不存在,请说明理由
您最近一年使用:0次
2020-01-11更新
|
1026次组卷
|
8卷引用:四川省成都市温江区2018-2019学年高一下学期期末数学试题
10 . 已知三棱锥
(如图1)的平面展开图(如图2)中,四边形
为边长等于
的正方形,
和
均为正三角形,在三棱锥
中:
平面
;
(2)若点
在棱
上运动,当直线
与平面
所成的角最大时,求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a00d05c60999eff91345a545fb57e9af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98553247801c03de24cf7e687016e655.png)
您最近一年使用:0次
2019-12-27更新
|
773次组卷
|
3卷引用:江苏省南通市如皋中学2019~2020学年高一上学期阶段考试数学试题(创新班)