名校
1 . 如图,正方体
的棱长为1,
为
的中点,
在侧面
上,有下列四个命题:
①若
,则
面积的最小值为
;
②平面
内存在与
平行的直线;
③过
作平面
,使得棱
,
,
在平面
的正投影的长度相等,则这样的平面
有4个;
④过
作面
与面
平行,则正方体
在面
的正投影面积为
.
则上述四个命题中,真命题的个数为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aad0b1a4-61f0-4b44-b7cf-a036874e3e01.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cc064d914c1b4191d00f4b00032aad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45504031c84b187f9c6324622415ea22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fd7940df8100511c9b98ed85d014a3.png)
②平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
③过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
④过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
则上述四个命题中,真命题的个数为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aad0b1a4-61f0-4b44-b7cf-a036874e3e01.png?resizew=170)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2019-06-07更新
|
1938次组卷
|
5卷引用:【市级联考】广东省肇庆市2019届高中毕业班第三次统一检测数学(理)试题
【市级联考】广东省肇庆市2019届高中毕业班第三次统一检测数学(理)试题浙江省嘉兴一中2019-2020学年高二上学期10月月考数学试题(已下线)考点29 空间向量解决空间直线、平面位置关系-备战2021年新高考数学一轮复习考点一遍过(已下线)“8+4+4”小题强化训练(37)空间向量及其应用-2022届高考数学一轮复习(江苏等新高考地区专用)(已下线)专题03 空间向量与立体几何的压轴题(一)-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)
名校
2 . 如图,已知在直三棱柱
中,
,
,点
是
上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/61ab8dad-882b-48c7-820e-57930bfb79c2.png?resizew=179)
(1)求证:
;
(2)若
是
上的中点,求证:
面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552cc956581e9df72fe0e1af203881f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/61ab8dad-882b-48c7-820e-57930bfb79c2.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca714e3eade6d63792b729f4ff9f8316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1847074419e82f9f04b9596e4fbe19.png)
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3 . 如图,在以
,
,
,
,
,
为顶点的五面体中,平面
平面
,
是边长为
的正三角形,直线
与平面
所成角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/a1e25616-2ca3-4310-b53b-b00ef9e15f8b.png?resizew=152)
(I)求证:
;
(Ⅱ)若
,四边形
为平行四边形,求平面
与平面
所成锐二面角的余弦值.
![](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/c5db41a1f31d6baee7c69990811edb9f.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d4cf0fb44aa1e6bdaf2a4bdfb37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/a1e25616-2ca3-4310-b53b-b00ef9e15f8b.png?resizew=152)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda0065dba34b90de18ad2d9009aefe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
4 . 如图所示,在
中,
,
,
,在
边上任取一点
,并将
沿直线
折起,使平面
平面
,则折叠后
、
两点间距离的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/df09e8cd-409a-4c5e-b5c1-74b0700b2614.png?resizew=278)
您最近一年使用:0次
名校
5 . 如图,直二面角
,
,
,
,且
,
,
,
,
,
,则点
在平面
内的轨迹是
![](https://img.xkw.com/dksih/QBM/2019/5/10/2200896961789952/2201256029872128/STEM/cff0e0ba-6010-4f99-b7c8-0da70b4e1ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ce3f859c6b9a0cfc98bdf5b3d0f395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0deaf25ea84cc8c9ebff72fb0c55842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b337dd084091eb575895a6278e828320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaccf1887c4b530fd86a2f0f199c6797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad6cd60b063486649a5d5202b578e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2019/5/10/2200896961789952/2201256029872128/STEM/cff0e0ba-6010-4f99-b7c8-0da70b4e1ba1.png)
A.圆的一部分 | B.椭圆的一部分 | C.一条直线 | D.两条直线 |
您最近一年使用:0次
2019-05-11更新
|
2421次组卷
|
5卷引用:河南省名校-鹤壁高中2019届高三压轴第二次考试数学(文科)试题
河南省名校-鹤壁高中2019届高三压轴第二次考试数学(文科)试题2020年普通高等学校招生全国统一考试文科数学样卷(九)江西省南昌市南昌县莲塘第二中学2018-2019学年高二下学期期末考试数学(理科)试题(已下线)痛点13 立体几何中的最值、轨迹问题-2021年新高考数学一轮复习考点扫描陕西省西北工业大学附属中学2022届高三下学期第十一次适应性训练理科数学试题
6 . 在等腰直角
中,
,
,
为
中点,
为
中点,
为
边上一个动点,
沿
向纸面上方或者下方翻折使
,点
在面
上的投影为点
,当点
在
上运动时,以下说法错误的是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/9e232054-35d2-475a-a9eb-7a9a2605b950.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f80f699558ff62a31152df321b064f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008efa3204b3fe4cc234b507bc59fb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02795ff1af51fb0672800ceb02e7893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd696d3deb68e36125631368d4f28a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30bde0cd7f10999e25d1f63dfb6338d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671b087abb1d2692c8be5b16846c4690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/9e232054-35d2-475a-a9eb-7a9a2605b950.png?resizew=163)
A.线段![]() ![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
名校
7 . 如图,在四棱锥
中,侧面
底面
,底面
平行四边形,
,
,
,
为
的中点,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/8f076fdd-bdff-40df-a12e-325f688630ca.png?resizew=184)
(1)求证:
;
(2)试确定点
的位置,使得直线
与平面
所成的角和直线
与平面
所成的角相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62526e69e7c4e59d9df8a5b2c2426400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692300f1ba0c83d7ffd4d0c6f36c9232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/8f076fdd-bdff-40df-a12e-325f688630ca.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2019-12-07更新
|
275次组卷
|
11卷引用:福建省三明市2017届高三下学期普通高中毕业班5月质量检查理科数学试题
福建省三明市2017届高三下学期普通高中毕业班5月质量检查理科数学试题福建泉州新世纪中学2017届高三普通高中毕业班质量检查数学(理)试题福建省三明市2017年普通高中毕业班5月质量检查理科数学试题四川省凉山州2018届高三毕业班第二次诊断性检测数学(理科)试题重庆市江津中学校2018届高三4月月考数学(理)试题【全国百强校】四川省双流县棠湖中学2019届高三上学期期末考试数学(理)试题江苏省南京市二十九中2020-2021学年高二下学期期初数学试题四川省蓬溪县蓬南中学2022-2023学年高三上期第四次月考数学试题(已下线)专题8.7 立体几何中的向量方法(讲)【理】-《2020年高考一轮复习讲练测》重庆市2023届高三下学期第四次联考数学试题四川省泸州市合江县马街中学校2024届高三上学期期末数学(理)试题
8 . 如图,在四棱锥
中,底面
是边长为2的菱形,
,
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7813b4cc-120d-4089-b3e8-858c099e9dac.png?resizew=219)
(1)求证:
:
(2)求点
到平面
的距离.
![](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/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18a77f741b7f3553a7fa83e653ac667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f4df35b7d57bf69dea9f6cafa8fae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7813b4cc-120d-4089-b3e8-858c099e9dac.png?resizew=219)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2019-04-28更新
|
1117次组卷
|
2卷引用:【市级联考】广东省广州市2019届高三第二次模拟考试数学(文)试题
名校
9 . 如图,点
在正方体
的面对角线
上运动,则下列四个命题:
①
面
;
②
;
③平面
平面
;
④三棱锥
的体积不变.
其中正确的命题序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011abe509df00fe9410ab08b585ad7db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc00eef1ed63477a276563262e85e84.png)
③平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55dc841ce2bb4d2673f48391bf2886d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288b953ac595bc515fcc97716697b739.png)
其中正确的命题序号是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/10403907-f156-435f-a76f-bf369029d701.png?resizew=189)
您最近一年使用:0次
2019-04-16更新
|
714次组卷
|
3卷引用:【市级联考】四川省眉山市2018-2019学年高二上学期期末教学质量检测理科数学试题
解题方法
10 . 如图,在四棱锥
中,底面是边长为2的正方形,
⊥底面
,
为
的中点,
与平面
所成的角为
.
![](https://img.xkw.com/dksih/QBM/2020/2/28/2408951150436352/2409506465693696/STEM/c71c0d67c55844e3b9a25ea5bfbe50b7.png?resizew=220)
(1)求证:
;
(2)求异面直线
与
所成的角的大小(结果用反三角函数表示);
(3)若直线
、
与平面
所成角分别为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717d026dd0029aab76fd410d88f67bd8.png)
![](https://img.xkw.com/dksih/QBM/2020/2/28/2408951150436352/2409506465693696/STEM/c71c0d67c55844e3b9a25ea5bfbe50b7.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746f70c9993f04a5037c53daf3d1af00.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd64aaccd976873d5c241352be7e09a.png)
您最近一年使用:0次