1 . 在梯形中,
,
,
,E为
的中点,如图(1).将
沿
折起至
的位置,使平面
平面
,如图(2).
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若F为线段PB上的点(不含端点),且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d22425a498c8f57a8d0d59bd8509cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a8123abd239549f7b0b1c98ff21133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f842ab85586e5f6d55eb8234b9bc27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
名校
2 . 如图,在
中,
,斜边
,以直线AO为轴旋转
得到
,且二面角
是直二面角,动点D在斜边AB上.
(1)求证:平面
平面
;
(2)求CD与平面
所成角中最大角的正切值;
(3)当D为AB中点时,继续以直线AO为轴旋转
得到
,当直线ED与OB所成角为
时,求点E位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991c8373be20b4325ba779e4dfdc8b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864aa0f490f42c358d1550c99bd81c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19c1bcb8431ae315ecd29c6478d3eff.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a55c40bb7437081d8e669974c8d1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)求CD与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(3)当D为AB中点时,继续以直线AO为轴旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0c1e3791bf2338e8943067ec404ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/89081e53-6664-4b7b-85ef-dfbaef2d2c22.png?resizew=116)
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名校
3 . 如图,在四棱锥中,
,
,四边形
是菱形,
,
是棱
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/a58bcd5d-b701-4102-a02b-07a3eb5a9a87.png?resizew=160)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013552105bb2e358f80cd9585b60e829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2024-01-03更新
|
2034次组卷
|
7卷引用:广西2024届高三高考桂柳鸿图数学模拟金卷试题(四)
广西2024届高三高考桂柳鸿图数学模拟金卷试题(四)广东省广州市真光中学2023-2024学年高二上学期期末模拟数学试题北京市丰台区怡海中学2023-2024学年高二上学期期末模拟练习数学试题(2)福建省福州教育学院附属中学2023-2024学年高二上学期期末考试数学试题6.3 空间向量的应用 (5)(已下线)专题05 空间向量与立体几何(解密讲义)(已下线)3.4.3 求角的大小(九大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
名校
解题方法
4 . 已知在四棱锥
中,底面
是边长为4的正方形,
是正三角形,平面
平面
,E、F、G分别是
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/baecc13e-8796-4a3a-b63b-fe5413282fbf.png?resizew=197)
(1)求证:
平面
;
(2)线段
上是否存在一个动点M,使得直线
与平面
所成角为
,若存在,求线段
的长度,若不存在,说明理由.
![](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/55a675310c8ba418e5a59beb7317e21e.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/baecc13e-8796-4a3a-b63b-fe5413282fbf.png?resizew=197)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
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2024-01-02更新
|
820次组卷
|
4卷引用:重庆市杨家坪中学2023-2024学年高二上学期第三次月考数学试题
重庆市杨家坪中学2023-2024学年高二上学期第三次月考数学试题江西省上饶市玉山县第二中学2023-2024学年高二上学期12月月考数学试题(已下线)专题13 空间向量的应用10种常见考法归类(3)(已下线)6.3 空间向量的应用 (4)
名校
5 . 如图,在四棱锥
中,底面
为矩形,
平面
,
,点
在棱
上,且
.
;
(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/411b38a18046fea8e9fab1f9f9b80a5f.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/cec58f4dedc26f3da0b2998e6418a879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5405438dc935b2530eb3e9990c727ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e403844f3bf87b4ebcdc4d28bbb04d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c9370f39106158d21c44ba4dde6f76.png)
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2023-12-29更新
|
442次组卷
|
4卷引用:云南省楚雄市东兴中学2024届高三上学期12月月考数学试题
名校
解题方法
6 . 在棱长为1的正方体
中,点
满足
,其中
,
,则下列说法正确的是( )
![](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/6f9dd1458186cfbdf0701ba835572721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe62a251f3d6dfb60ba2a42bdda534c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54e229cadeac6ea81a965c18cb55b5d.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-12-29更新
|
465次组卷
|
3卷引用:河南省九师联盟大联考2024届高三上学期12月月考数学试题
名校
解题方法
7 . 如图,四棱锥
的底面是边长为
的正方形,侧面
底面
,且
分别为棱
的中点.
(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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81cb4e40c23af346691d5489983252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2107ed4c826d711675d3c5b23e1b2c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/eeb5fc1c-8179-4051-b200-f1231616e626.png?resizew=200)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50817ff14fb74ab1d509be07836699bd.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
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2023-12-28更新
|
280次组卷
|
3卷引用:重庆市黔江中学校2023-2024学年高二上学期12月月考数学试卷
8 . 中和殿是故宫外朝三大殿之一.位于紫禁城太和殿与保和殿之间,中和殿建筑的亮点是屋顶为单檐四角攒尖顶,体现天圆地方的理念,其屋顶部分的轮廓可近似看作一个正四棱锥.已知此正四棱锥的侧棱长为
,侧面与底面所成的锐二面角为
,这个角接近30°.若取
,则下列结论不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/36990f09-2150-4328-bec2-98fbd35c5437.png?resizew=213)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662776401eca1b3cc581738e2f5ecf91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7b9d9bf0d5fc25c99170ab27fa4045.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/36990f09-2150-4328-bec2-98fbd35c5437.png?resizew=213)
A.正四棱锥的底面边长为24m | B.正四棱锥的高为![]() |
C.正四棱锥的体积为![]() | D.正四棱锥的侧面积为![]() |
您最近一年使用:0次
2023-12-28更新
|
787次组卷
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3卷引用:天津市滨海新区塘沽第一中学2024届高三毕业班暑期作业调研入学考试数学试卷
名校
解题方法
9 . 如图,在棱长为8的正方体
中,
是棱
上的一个动点,给出下列三个结论:①若
为
上的动点,则
的最小值为
;②
到平面
的距离的最大值为
;③
为
的中点,
为空间中一点,且
与平面
所成的角为
,
与平面
所成的角为
,则
在平面
上射影的轨迹长度为
,其中所有正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41bbced6026f9512afa005638c6e5c4.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3698ab627bc373f4a452481d7cad25.png)
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2023-12-28更新
|
445次组卷
|
4卷引用:河北省保定市部分重点高中2024届高三上学期12月期末数学试题
河北省保定市部分重点高中2024届高三上学期12月期末数学试题2024届河北省高三上学期大数据应用调研联合测评(III)数学试题(已下线)第3章 空间向量及其应用 单元综合检测(难点)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)(已下线)【一题多变】空间最值 向量求解
10 . 如图,在直角梯形
中,
,
,且
,现以
为一边向形外作正方形
,然后沿边
将正方形
翻折,使平面
与平面
互相垂直.
(1)求证:平面
平面
;
(2)求点
到平面
的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0046177466c78f08d45449dc5639bf38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/ed66e110-9d08-4051-bf6b-19e3241c7fa6.png?resizew=383)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a814b70236a108be5d6e7ff271fe92.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
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