1 . 如图,在三棱柱
中,平面
平面
,四边形
是正方形,O是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/70fe19f2-c519-4a3c-b839-be38341804f8.png?resizew=194)
(1)证明:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7af14145a4431ac0c7699f4269645f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/70fe19f2-c519-4a3c-b839-be38341804f8.png?resizew=194)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f6a1b0761cb375279e1b76e6c2eefc.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d4e5503f20c3bcb6e511bf181303a7.png)
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2023-01-15更新
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185次组卷
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2卷引用:贵州省安顺市黄果树高级中学2022-2023学年高二上学期第一次月考数学试题
名校
解题方法
2 . 已知直三棱柱
中,
,
,点M式
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/1657d64b-6934-4272-90c5-303a76651105.png?resizew=114)
(1)求证: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/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3419a18ac5c41a3a1ad5369956807cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/1657d64b-6934-4272-90c5-303a76651105.png?resizew=114)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a2712f9cc643d4983d37c9dfe880ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b4f16694b2bd79a1a93d776a82680.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
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2022-11-22更新
|
562次组卷
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6卷引用:贵州省遵义市第一中学2022-2023学年高二上学期第二次月考数学试题
贵州省遵义市第一中学2022-2023学年高二上学期第二次月考数学试题黑龙江省联考2022-2023学年高二上学期期中数学试题辽宁省朝阳市建平县实验中学2022-2023学年高二上学期期中数学试题江苏省盐城市响水中学2022-2023学年高二下学期期中数学试题(已下线)高二下学期期末押题卷01-【同步题型讲义】2022-2023学年高二数学同步教学题型讲义(人教A版2019选择性必修)山东省潍坊市昌乐县昌乐二中2023-2024学年高三上学期9月月考数学试题
名校
解题方法
3 . 如图,在三棱锥
中,
⊥底面
,
.点
,
,
分别为棱
,
,
的中点,
是线段
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/bd72c31e-a21a-45f7-9db1-0a942655b866.png?resizew=154)
(1)求证:
∥平面
;
(2)求平面PAC与平面EMN所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487b14c446e989c68d0e148cc557dbf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/bd72c31e-a21a-45f7-9db1-0a942655b866.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面PAC与平面EMN所成角的余弦值.
您最近一年使用:0次
2022-11-15更新
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349次组卷
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5卷引用:【全国百强校】贵州省遵义航天高级中学2018-2019学年高二下学期第一次(3月)月考数学(理)试题
4 . 在直棱柱
中,点
为棱
的中点,底面
为等腰直角三角形,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/6989d871-7674-4328-a9a9-0d7093462208.png?resizew=152)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42066e0ef0cb9012bc93b6cfe978c80b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/6989d871-7674-4328-a9a9-0d7093462208.png?resizew=152)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dddfef906818cc8ddd00f867b77f227.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59b1f7689bff6644bfdeb9e36feb163.png)
您最近一年使用:0次
5 . 如图,在四棱锥
中,
底面ABCD,
,E为棱PD的中点,F是线段PC上一动点.
平面PAB;
(2)若直线BF与平面ABCD所成角的正弦值为
时,求点C到平面AEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb18c7c5391647214d4da31a88202d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12040970d765f83dc194b05fc0a7307d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4787d10940c2bfca1c5aded470034a13.png)
(2)若直线BF与平面ABCD所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137f98c6367086cc159aaa5f2e45ee7d.png)
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2022-10-25更新
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5卷引用:贵州省贵阳市“三新”改革联盟校2022-2023学年高二上学期联考试题(五)数学试题
解题方法
6 . 已知
,
是椭圆E:
(
)的两个焦点,点
在E上,且
的面积为
.
(1)求椭圆E的方程;
(2)过点
的直线l与椭圆E交于C,D两点,直线
,
分别与直线
交于M,N两点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc35409c8054fe18431c70e6fea0334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9b4081755dd5d63529f95fab4ca51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cfd997d3b66a3b8f7731b26f0ab0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
(1)求椭圆E的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b1fbb492135ae47351b588a2c4ab35.png)
您最近一年使用:0次
名校
7 . 如图,在四棱锥
中,底面ABCD为菱形,
为正三角形,平面
平面
,
.
(1)证明:
;
(2)若
为
的中点,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5a738491886eb76ebd90c53ebbcd86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/7d0d2cb1-5bcc-49a5-826a-1c38de5490df.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21be01a95cdd3149512bf95d6084fdd6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa16146cb21f11693feffb0876c0795b.png)
您最近一年使用:0次
2023-06-14更新
|
286次组卷
|
2卷引用:贵州省镇远县文德民族中学校2023届高三下学期5月月考(全国甲卷押题卷三)数学(理)试题
名校
解题方法
8 . 已知关于x的方程
有一个根为
.
(1)求证:方程
有一个根为
的充要条件是
;
(2)若
,解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(1)求证:方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c766352f0be38b719621052de92615bd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84617aaab200384efeaec9a4fe71772.png)
您最近一年使用:0次
2022-10-15更新
|
322次组卷
|
3卷引用:贵州省贵阳市第一中学2022-2023学年高一上学期第一次摸底考试数学试题
名校
解题方法
9 . 如图,在三棱柱
中,侧面
为菱形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/8a5897a8-04d9-41a0-b939-68dc1e69710e.png?resizew=213)
(1)求证:平面
平面
;
(2)已知线段
上存在一点
,使得
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8db421b3e8872ee5add4480da4a291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb24987c2a589ae958def9c7cab5e9d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/8a5897a8-04d9-41a0-b939-68dc1e69710e.png?resizew=213)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cabc3303519ac16fc998913ad9f349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c1e7eafeb3a1695ef9336d44e63394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93316e0e0ed337f62b17408584f14da3.png)
您最近一年使用:0次
名校
解题方法
10 . 中国古代数学名著《九章算术》中记载:“刍甍者,下有表有广,而上有表无广刍,草也,甍,屋盖也”.翻译为“底面有长有宽为矩形,顶部有长没有宽为一条棱;刍甍为茅草屋顶”,现将一个正方形折叠成一个“刍甍”,如图1,E、F、G分别是正方形的三边AB,CD,AD的中点,先沿着虚线段FG将等腰直角三角形FDG裁掉,再将剩下的五边形ABCFG沿着线段EF折起,连接AB,CG就得到了一个“刍甍”,如图2.
平面GCF;
(2)若二面角A—EF—B的大小为
,求直线AB与平面GCF所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8918734c91aba3280ca73a44edd28370.png)
(2)若二面角A—EF—B的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732250efe9c8c0cbca127fb2ed2a4bf9.png)
您最近一年使用:0次
2023-01-12更新
|
463次组卷
|
4卷引用:贵州省天柱民族中学2024届高三上学期第三次月考数学试题