1 . 如图所示,在直三棱柱
中,
,其中点
为棱
的中点,
为棱
上且位于
点上方的动点.
(1)求证:
平面
;
(2)若平面
与平面
所成的锐二面角的余弦值为
,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/f1611e6d8c53342220a7386b238110f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b4e753ef119608188c46a50ec597e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64484f96568410926e0c50898eba6e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e763e8c7139ffeb0cc7269ae4cdfeab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
您最近一年使用:0次
2019-03-11更新
|
501次组卷
|
2卷引用:【市级联考】湖北省恩施州2019届高三2月教学质量检测数学(理)试题
2 . 如图,在长方体
中,
,则下列结论不正确的为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/d99ef224-52ed-468f-b755-6711f1679be2.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d30e49e97f35ea7b40ec44a7e69c1d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/d99ef224-52ed-468f-b755-6711f1679be2.png?resizew=169)
A.平面![]() ![]() |
B.存在平面![]() ![]() ![]() ![]() |
C.存在直线![]() ![]() ![]() ![]() |
D.存在直线![]() ![]() ![]() ![]() |
您最近一年使用:0次
3 . 已知
,
是空间中的两条不同的直线,
,
是空间中的两个不同的平面,则下列命题正确的是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2019-03-05更新
|
1089次组卷
|
3卷引用:2019届湖北省黄冈中学高三下学期5月第三次模拟考试数学(文)试题
4 . 如图
,梯形
中,
,过
分别作
,
,垂足分别
,
,已知
,将梯形
沿
同侧折起,得空间几何体
,如图
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/04cd611c-d016-4e37-bab1-66d7c2f132fa.png?resizew=394)
1
若
,证明:
平面
;
2
若
,
,线段
上存在一点
,满足
与平面
所成角的正弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baca09215d12421a58bd6a48ae16c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f4a2bbfb86ca5c6099a6d7330a8478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268544817735d20ffbceef3b26db5dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a935e957d5cb3794901468489aca38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0c12379ff58d8ddf66547d7a873baf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/04cd611c-d016-4e37-bab1-66d7c2f132fa.png?resizew=394)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dced11455b3e31a9090915f80a046fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ea07c396a9883d159ce2887ce65466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
2019-03-04更新
|
3159次组卷
|
8卷引用:【市级联考】湖北省荆门市2019届高三元月调研考试数学(理)试题
5 . 如图所示的几何体中,ABC-A1B1C1为三棱柱,且AA1⊥平面ABC, AA1=AC,四边形ABCD为平行四边形,AD=2CD=4,∠ADC=60°.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/37c8da88-ca48-4073-96e2-0fa003e6adf9.png?resizew=174)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/37c8da88-ca48-4073-96e2-0fa003e6adf9.png?resizew=174)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5718fe055b1d4a3f3cc4f32e9b567499.png)
(Ⅱ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcecfc88e45465b7e2215a8557148da.png)
您最近一年使用:0次
2019-02-21更新
|
1391次组卷
|
8卷引用:2019届湖北省黄冈中学高三下学期5月第三次模拟考试数学(文)试题
6 . 如图,四棱锥
中,底面
为菱形,
底面
,
,
,
是
上的一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/84953200-9d02-470d-8ac7-5e4397cb1fd7.png?resizew=182)
(1)证明
平面
;
(2)设二面角
为
,求
与平面
所成角的大小
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b384315ba84cafb978ef3619c8162b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/84953200-9d02-470d-8ac7-5e4397cb1fd7.png?resizew=182)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2019-01-30更新
|
8255次组卷
|
24卷引用:湖北省宜昌市长阳一中2017-2018学年高二(上)9月月考数学(文科)试题
湖北省宜昌市长阳一中2017-2018学年高二(上)9月月考数学(文科)试题【市级联考】河南省洛阳市2019届高三第三次统一考试数学(理)试题2021届高三新高考统一适应性考试江苏省南通中学2020-2021学年高三上学期12月考前热身练数学试题湖北省襄阳四中2021届高三下学期5月高考适应性考试数学试题广东省佛山区大沥高级中学2020-2021学年高三上学期学科素养阶段性调研数学试题湖北省武汉市第四十九中学2024届高三上学期九月调考模拟数学试题(一)2012年全国普通高等学校招生统一考试理科数学(大纲卷)2012年全国普通高等学校招生统一考试文科数学(大纲卷)2017届广东汕头市高三理上学期期末数学试卷吉林省吉林市吉化一中2019-2020学年高一上学期第二次月考数学试题河南省南阳市2019-2020学年高三上学期期末数学(理)试题安徽省滁州市定远县育才学校2020-2021学年高二上学期第一次月考数学(文)试题广东省汕头市金山中学2021届高三下学期三模数学试题人教A版(2019) 必修第二册 突围者 第八章 易错疑难集训(四)四川省绵阳南山中学2023届高三4月绵阳三诊热身理科数学试题福建省莆田市2020-2021学年高二上学期数学期末考试数学试题河南省南阳市2020-2021学年高二上学期期末数学(理)试题江苏省扬州市邗江区蒋王中学2021-2022学年高三上学期第一次检测数学试题北京市汇文中学2021-2022学年高二上学期期中考试数学试题广东省揭阳华侨高级中学2022届高三上学期第二次阶段考试数学试题河南省南阳市第一中学校2021-2022学年高三上学期第一次网上限时训练数学(理)试题江西省吉安市第一中学2024届高三上学期开学考试数学试题四川省成都市成华区某校2023-2024学年高三上学期期末考试数学(理)试题(已下线)第七章 应用空间向量解立体几何问题拓展 专题二 平面法向量求法及其应用 微点2 平面法向量求法及其应用(二)【基础版】
7 . 如图,在四棱锥
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/03d513e4-07a5-4135-a41f-f3d731fd5703.png?resizew=135)
(1)求证:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b7efcc776e3479d01484cd468c6894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77c16357eabed95d85bbd4e3dada92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c2771b63f28176f388430e6a169a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921a71040d18df8b33bc41995675a586.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/03d513e4-07a5-4135-a41f-f3d731fd5703.png?resizew=135)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7d6e5be7914a224e94a7b7e409a79c.png)
您最近一年使用:0次
8 . 如图,在四棱锥
中,
,
,
,且PC=BC=2AD=2CD=2
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/997728a6-68e7-4111-b26a-5f6d68ede25a.png?resizew=204)
(1)
平面
;
(2)已知点
在线段
上,且
,求点
到平面
的距离.
![](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/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/997728a6-68e7-4111-b26a-5f6d68ede25a.png?resizew=204)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8676b624f105072a3185911b25c912dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
您最近一年使用:0次
9 . 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
|
3114次组卷
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20卷引用:【省级联考】湖北省2019届高三1月联考测试数学(理)试题
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名校
10 . 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)
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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