1 . 如图,已知在四棱锥
中,
底面
,
,
,
,
,点
为棱
的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/86b93d72-219c-42e0-b1b1-a44b8a478ccc.png?resizew=158)
(1)试在棱
上确定一点
,使平面
平面
,说明理由;
(2)若
为棱
上一点,满足
,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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/86b93d72-219c-42e0-b1b1-a44b8a478ccc.png?resizew=158)
(1)试在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bfd555878cb84602f42d903cdce665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f637bf133818d36ad04ce78d3a6cc80.png)
您最近一年使用:0次
2 . 设边长为2的正方形
的中心为
,过
作平面
垂线
,
,
为
中点,则
与
夹角余弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19053584897fb300cfce8407b6483821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4043779cd0f8bc1217dbd0a68e9f5f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19053584897fb300cfce8407b6483821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7a0b39b57b5781c564ec90296e1207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91480dc7ccaa64eecbd60abe3975c713.png)
您最近一年使用:0次
2019-01-22更新
|
196次组卷
|
2卷引用:【市级联考】湖北省黄冈市2018年秋季高二年级期末考试数学(理科)试题
3 . 如图所示,在四棱锥
中,
,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d5f8a4198e29b75dc090ef98f02584.png)
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/a373203b-ae3d-49cc-8ccc-edd60755dede.png?resizew=208)
(1)
平面
;
(2)在线段
上,是否存在一点
,使得二面角
的大小为
?如果存在,求
的值;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132078d5f2e4e80b10879952cecc3465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d5f8a4198e29b75dc090ef98f02584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b62c3dd4a30e7e84da6831d6cac33a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/a373203b-ae3d-49cc-8ccc-edd60755dede.png?resizew=208)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698335f4880c7a298f4898c83b6562bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47548785e478bc5b9591341a881e3127.png)
您最近一年使用:0次
2019-01-14更新
|
3113次组卷
|
20卷引用:湖北省黄冈市黄州中学2021-2022学年高二上学期新起点开学考试数学试题
湖北省黄冈市黄州中学2021-2022学年高二上学期新起点开学考试数学试题湖北省黄冈市黄梅国际育才高级中学2023-2024学年高二上学期10月月考数学试题【省级联考】湖北省2019届高三1月联考测试数学(理)试题陕西省榆林市一中2019届高考模拟考试理科数学 【全国百强校】四川省成都七中2019届高三下学期入学考试(理科)数学试题【市级联考】河南省濮阳市2019届高三5月模拟考试数学(理)试题山西省太原市第五中学2019-2020学年高二10月阶段性检测数学(理)试题河南省南阳市第一中学2019-2020学年高三第十一次考试数学(理)试题(已下线)专题25 立体几何中的最值,探索性问题-冲刺2020高考跳出题海之高三数学模拟试题精中选萃2019届天津市高三高考压轴数学(理)试题(已下线)专题04 立体几何的探索性问题(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖2019届湖南省长沙市宁乡一中高三下学期5月高考适应性考试理科数学试题(已下线)黄金卷06-【赢在高考·黄金20卷】备战2021年高考数学(理)全真模拟卷(新课标Ⅲ卷)(已下线)黄金卷10-【赢在高考·黄金20卷】备战2021年高考数学(理)全真模拟卷(新课标Ⅱ卷)河南省六市高三2021届第二次联考(二模)数学(理科)试题陕西省西安中学2021届高三下学期第五次模拟数学(理)试题河南省平顶山市2021-2022学年高三上学期阶段性检测数学(理)试题沪教版(2020) 必修第三册 精准辅导 期中测试四川省泸县第五中学2023届高三三诊模拟理科数学试题河南省焦作市第十一中学2023-2024学年高二上学期11月月考数学
4 . 已知空间向量
,平面
的一个法向量为
,则直线
与平面
所成角
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15ce686998fdd3cfbd41b02f68ebb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd42c9356f9ada43ce41d125fe6c80b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-01-10更新
|
557次组卷
|
3卷引用:湖北省黄冈市黄梅县国际育才高级中学2023-2024学年高二上学期12月月考数学试题
名校
5 . 如图所示,四棱锥
中,
,四边形
为等腰梯形,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2018/12/18/2099615413665792/2100018737233920/STEM/b2f841e48afc40f4ae0f562b31e2bb1f.png?resizew=181)
(1)求证:
.
(2)求面
与平面
所成的二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e122df50c37ee50bd839c130a223ca72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454a37144b72f7ff9bb3f3fc8c54003e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2018/12/18/2099615413665792/2100018737233920/STEM/b2f841e48afc40f4ae0f562b31e2bb1f.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0faf4da630e8c20bef0791f833e74d.png)
(2)求面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2018-12-19更新
|
500次组卷
|
4卷引用:【校级联考】湖北省黄冈、华师附中等八校2019届高三上学期第一次联考数学(理)试题
名校
6 . 三棱柱
的底面
是等边三角形,
的中点为
,
底面
,
与底面
所成的角为
,点
在棱
上,且
.
(1)求证:
平面
;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fd8af22a7d27ebcfd5febd3e81ed2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c640abbdc470479407da1ae2aa80fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65af1d6b6b831ebbdc36dda5f304a3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c640abbdc470479407da1ae2aa80fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5e36ce7f0538438e7c6454b3843122.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/1ac1eaa4-f771-40f1-bfd8-beee1b8109f2.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b730eaca93ece932369e23f619942bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d5a373112efbf36f1989234a4c19aa.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46f86de6166bf4913c5dd542cb2af5a.png)
您最近一年使用:0次
2018-11-08更新
|
1840次组卷
|
5卷引用:2019届湖北省黄冈中学高三下学期5月第二次模拟考试数学(理)试题
7 . 在如图所示的多面体中,平面
平面
,四边形
是边长为2的菱形,四边形
为直角梯形,四边形
为平行四边形,且
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
(1)若
分别为
,
的中点,求证:
平面
;
(2)若
,
与平面
所成角的正弦值
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f91e570476d981288631a3aecd9631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a61b4736b049e7a229f7ff83c2fd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171429a1afe5bb4ee4cb811af61b1365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46340bfad3505ef24f4916a61dd1a5e.png)
![](https://img.xkw.com/dksih/QBM/2019/3/26/2168910458978304/2168953102548992/STEM/4bab63dbd8f84cd0952465f5520fbf58.png?resizew=211)
您最近一年使用:0次
2018-04-20更新
|
994次组卷
|
5卷引用:2019届湖北省黄冈市高三下学期3月调研考试数学(理)试题
8 . 如图,在Rt
中,
,点
、
分别在线段
、
上,且
,将
沿
折起到
的位置,使得二面角
的大小为
.
(1)求证:
;
(2)当点
为线段
的靠近
点的三等分点时,求
与平面
所成角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa1c07becd03537beeb09a31745cf5.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bd9e8b54864ca44115d24a5aeeb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f201a40fedca4ad14db193f4db2127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1c4ed7451103f0cbf14bb9ae219b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51c49eed6d720f2dc30cf1a79721bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901807738150912/1902197858361344/STEM/fef8f437c8f148e8a508e66d289256ae.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901807738150912/1902197858361344/STEM/45d68d0767d340ac9d9d680dddac3f5b.png?resizew=419)
您最近一年使用:0次
名校
解题方法
9 . 如图,在直三棱柱
中,
、
分别为
、
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2018/1/23/1866727688790016/1867196986048512/STEM/11ff22898b9c4dcf9b02d94df857da3d.png?resizew=171)
(1)求证:平面
平面
;
(2)若直线
和平面
所成角的正弦值等于
,求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3e8d881d96688ea15a868bb5a39f59.png)
![](https://img.xkw.com/dksih/QBM/2018/1/23/1866727688790016/1867196986048512/STEM/11ff22898b9c4dcf9b02d94df857da3d.png?resizew=171)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456175ea34492f0bc025aaab668fa659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a351d71fa01d3f5920e374a8ee7b524.png)
您最近一年使用:0次
2018-01-24更新
|
1028次组卷
|
5卷引用:湖北省黄冈市黄州区第一中学2019-2020学年高二下学期5月月考数学试题
名校
解题方法
10 . 已知
为等腰直角三角形,
,将
沿底边上的高线
折起到
位置,使
,如图所示,分别取
的中点
.
![](https://img.xkw.com/dksih/QBM/2017/6/11/1706487238623232/1706786620489728/STEM/f10cf6e1-f92d-4a0b-b9ce-403d72fd97ba.png?resizew=380)
(1)求二面角
的余弦值;
(2)判断在线段
上是否存在一点
,使
平面
?若存在,求出点
的位置,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a419d23da55f44924ac9f95caadf0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c46b92d7ff7055a3428852e745b263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9198488be5603009f210e981c7ffaeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d159d7a953c58b04eb75fb0bb06268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://img.xkw.com/dksih/QBM/2017/6/11/1706487238623232/1706786620489728/STEM/f10cf6e1-f92d-4a0b-b9ce-403d72fd97ba.png?resizew=380)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e7db44b6a24471272bb8a5d5fac797.png)
(2)判断在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53569e6ec795658b4fffcddeebe0f142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e753e51a67ee28ca98d3908d5cb0f84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2017-06-11更新
|
3295次组卷
|
7卷引用:湖北省黄冈市团风中学2021届高三下学期5月适应性考试一数学试题