名校
1 . 如图,在四棱锥
中,PA
面ABCD,AB
CD,且CD=2,AB=1,BC=
,PA=1,AB
BC,N为PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/2e5070b6-be71-4ac1-8866-3db509d25ff4.png?resizew=190)
(1)求证:AN
平面PBC;
(2)在线段PD上是否存在一点M,使得直线CM与平面PBC所成角的正弦值是
?若存在,求出
的值,若不存在,说明理由;
(3)在平面PBC内是否存在点H,满足
,若不存在,请简单说明理由;若存在,请写出点H的轨迹图形形状(不必证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/2e5070b6-be71-4ac1-8866-3db509d25ff4.png?resizew=190)
(1)求证:AN
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(2)在线段PD上是否存在一点M,使得直线CM与平面PBC所成角的正弦值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241a37fb1eff68a7133822b1b52d627e.png)
(3)在平面PBC内是否存在点H,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2da5312b15f602fcb8c0ffe9ea57a95.png)
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2022-11-18更新
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821次组卷
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3卷引用:福建省福州市八县(市)协作校2022-2023学年高二上学期期中考试数学试题
福建省福州市八县(市)协作校2022-2023学年高二上学期期中考试数学试题辽宁省大连市第八中学2022-2023学年高三上学期12月月考数学试题(已下线)第三章 空间轨迹问题 专题一 立体几何轨迹常见结论及常见解法 微点3 立体几何轨迹常见结论及常见解法综合训练【培优版】
名校
2 . 如图,在四棱锥
中,四边形
是矩形,
是正三角形,且平面
平面
,
,
为棱
的中点,四棱锥
的体积为
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
为棱
的中点,求证:
平面
;
(2)在棱
上是否存在点
,使得平面
与平面
所成锐二面角的余弦值为
?若存在,指出点
的位置并给以证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5830322dd2824ed012a68f1a2bd9c742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f79db7c270b6ff9fb0a538ee201cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b81fb655624ff75a5eab94de9b8c8e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072c32b9948144d040a9a83f8d11ea8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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25卷引用:江苏省南京市六校联合体2022-2023学年高三上学期8月联合调研数学试题
江苏省南京市六校联合体2022-2023学年高三上学期8月联合调研数学试题山西省山西大附属中学2023届高三上学期8月模块诊断数学试题福建省厦门外国语学校2023届高三上学期第一次月考数学试题(已下线)江苏省南通市如皋市2022-2023学年高三上学期10月诊断调研测试数学试题湖南省长沙市长郡中学2022-2023学年高二上学期期中数学试题(已下线)江苏省南通市如皋市2022-2023学年高三上学期期中模拟数学试题(已下线)专题16 空间向量及其应用(练习)-2黑龙江省哈尔滨市宾县第二中学2022-2023学年高二上学期第一次月考数学试题四川省资阳市安岳县安岳县周礼中学2022-2023学年高二上学期期中数学试题(已下线)河北省石家庄精英中学2023届高三上学期第四次调研数学试题云南省昆明市第三中学2023届高三上学期12月月考数学试题广东省韶关市武江区广东北江实验学校2022-2023学年高二下学期期中数学试题(已下线)专题1.10 空间向量的应用-重难点题型检测-2022-2023学年高二数学举一反三系列(人教A版2019选择性必修第一册)福建省厦门双十中学2023届高三上学期10月考试数学试题(已下线)高二上学期期中复习【第一章 空间向量与立体几何】十大题型归纳(拔尖篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)四川省仁寿第一中学校南校区2023-2024学年高二上学期10月月考数学试题吉林省吉林市第四中学2023-2024学年高二上学期9月月考数学试题福建省漳州市第三中学2024届高三上学期10月月考数学试题吉林省长春市朝阳区长春外国语学校2023-2024学年高二上学期期中数学试题湖南省邵阳市第二中学2023-2024学年高二上学期11月期中数学试题重庆市云阳县云阳高级中学校2023-2024学年高二上学期第二次月考数学试题广东省东莞市东莞外国语学校2023-2024学年高二上学期第二次段考数学试题重庆市九龙坡区渝高中学校2024届高三上学期第三次质量检测数学试题湖南省长沙市长郡中学2023-2024学年高二寒假作业检测数学试卷江苏省五市十一校2023-2024学年高二下学期5月阶段联考数学试题
名校
解题方法
3 . 如图,在四棱锥
中,
,
,
,平面
平面ABCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/d8dee249-e133-4f35-aca8-f9cbba1cddcc.png?resizew=180)
(1)求证:
;
(2)已知二面角
的余弦值为
.线段PC上是否存在点M,使得BM与平面PAC所成的角为30°?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946470cef32a0bd769b3809351d8ee61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279e119eed905cf15026649a1b86502a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/d8dee249-e133-4f35-aca8-f9cbba1cddcc.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
(2)已知二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f1e2b86f4eca37c72011d3dffb0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
您最近一年使用:0次
2021-01-13更新
|
974次组卷
|
5卷引用:福建省三明市2021届高三上学期期末质量检测数学试题
解题方法
4 . 如图所示的五面体中,
是正方形,
是等腰梯形,且平面
平面
,
为
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/5f7325ef-fea7-4210-9ac9-8317e8901ee3.png?resizew=209)
(1)求证:平面
平面
;
(2)
为线段
的中点,
在线段
上,记
,
是线段
上的动点. 当
为何值时,三棱锥
的体积为定值?证明此时二面角
为定值,并求出其余弦值.
![](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/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5747d138808e8ae03858c07dca6f19f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9003d21719232f65698743d8ecf8edd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/5f7325ef-fea7-4210-9ac9-8317e8901ee3.png?resizew=209)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e92d42e94cb01dabba1db6fc18c66b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7e524de0f5d99fbd82f58d28dd4219.png)
(2)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1d42d8642fcdd53522c07fe7b3db8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cc391036004bfc202e934285ee7fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63884ba9b24c3729315d0bb8a230d66.png)
您最近一年使用:0次
解题方法
5 . 在如图所示的六面体中,四边形ABCD是边长为2的正方形,四边形ABEF是梯形,
,平面
平面ABEF,BE=2AF=2,EF
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/7bdd7d5b-cfe5-4383-a128-6a9558fd4a51.png?resizew=147)
(1)在图中作出平面ABCD与平面DEF的交线,并写出作图步骤,但不要求证明;
(2)求证:
平面DEF;
(3)求平面ABEF与平面ECD所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3e927b7b2383ccded03838ae8b30b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/7bdd7d5b-cfe5-4383-a128-6a9558fd4a51.png?resizew=147)
(1)在图中作出平面ABCD与平面DEF的交线,并写出作图步骤,但不要求证明;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
(3)求平面ABEF与平面ECD所成锐二面角的余弦值.
您最近一年使用:0次
名校
6 . 如图,
是圆
的直径,点
是圆
上异于
的点,直线
平面
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/f7673e33-3c9c-4190-bb73-09d2d988c7ed.png?resizew=154)
(1)记平面
与平面
的交线为
,试判断直线
与平面
的位置关系,并加以证明;
(2)设(1)中的直线
与圆
的另一个交点为
,且点
满足
.记直线
与平面
所成的角为
,异面直线
与
所成的角为
,二面角
的大小为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1443bfe022f648f813fb1e15b2d78b6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/f7673e33-3c9c-4190-bb73-09d2d988c7ed.png?resizew=154)
(1)记平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)设(1)中的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd392c9dae5132e0f17c5520dc787e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c171ec70d3220e84f5bd7bd391b0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd506c8ce8db557d4808388b780f9d6.png)
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名校
解题方法
7 . 已知,图中直棱柱
的底面是菱形,其中
.又点
分别在棱
上运动,且满足:
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/2/2453970522234880/2453997798014976/STEM/4358c504-ca50-4dc5-b48b-a8ee2b0667d6.png)
(1)求证:
四点共面,并证明
∥平面
.
(2)是否存在点
使得二面角
的余弦值为
?如果存在,求出
的长;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa102f519d541f2e4d10a8975a41c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d6dc34b0b71d46a91eb8dd8db01f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360a93b9662f0ab8a69b131497520b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626db48efbecf4e318252ba13baff47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1357d24d53b523a55b3eea7b21fa16f1.png)
![](https://img.xkw.com/dksih/QBM/2020/5/2/2453970522234880/2453997798014976/STEM/4358c504-ca50-4dc5-b48b-a8ee2b0667d6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d6dc34b0b71d46a91eb8dd8db01f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c51c4a1148587943fe9ba210f6141ee.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e807172fa9eca2416f92f341adc06165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
您最近一年使用:0次
2020-05-02更新
|
1266次组卷
|
5卷引用:2020届河南省高三第十次调研考试数学(理)试题
2020届河南省高三第十次调研考试数学(理)试题江西省分宜中学、玉山一中等九校2019-2020学年高三联合考试数学理科试卷河北省衡水中学2019-2020学年高三下学期第十次调研数学(理)试题甘肃省兰州市第一中学2020届高三冲刺模拟考试(三)数学(理)试题(已下线)1.4 空间向量的应用-2021-2022学年高二数学尖子生同步培优题典(人教A版2019选择性必修第一册)
2011·北京西城·一模
8 . 如图,
是边长为
的正方形,
平面
,
,
,
与平面
所成角为
.
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/c2dd45c4ba1646c69e090be9382caaf5.png)
(Ⅰ)求证:
平面
;
(Ⅱ)求二面角
的余弦值;
(Ⅲ)设点
是线段
上一个动点,试确定点
的位置,使得
平面
,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/fe701b53575443c292db4d872e40ef05.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/2a3e33d681e842f8b71707d3b573487c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05638d82225327da27e5f916d2d4e747.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/fe701b53575443c292db4d872e40ef05.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/4ff673aaecc44d63acbd5c98d6eac0a3.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/527f9ac3d51e4280b1e8f14331835f42.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/b0a0b01103ed4e7b9373b12fcb75fef5.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/fe701b53575443c292db4d872e40ef05.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/7ae9bad96345493fb94386207d35553e.png)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/c2dd45c4ba1646c69e090be9382caaf5.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599b63c003aeb99d777e87182db8f019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(Ⅱ)求二面角
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572241494597632/1572241500585984/STEM/8162eff6ad1c42db89028790e9e2fb4f.png)
(Ⅲ)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
9 . 如图,AB是圆O的直径,点C是圆O上异于A,B的点,直线PC⊥平面ABC,E,F分别是PA,PC的中点.
(1)记平面BEF与平面ABC的交线为l,试判断直线l与平面PAC的位置关系,并加以证明;
(2)设(1)中的直线l与圆O的另一个交点为D,且点Q满足
.记直线PQ与平面ABC所成的角为θ,异面直线PQ与EF所成的角为α,二面角E﹣l﹣C的大小为β.求证:sinθ=sinαsinβ.
(1)记平面BEF与平面ABC的交线为l,试判断直线l与平面PAC的位置关系,并加以证明;
(2)设(1)中的直线l与圆O的另一个交点为D,且点Q满足
![](https://img.xkw.com/dksih/QBM/2014/5/22/1571735197384704/1571735202594816/STEM/fe360ef4630f4137844de7807a4b52b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/29f8132e-d52b-4bb3-be15-39727acee098.png?resizew=195)
您最近一年使用:0次
2016-12-03更新
|
2775次组卷
|
4卷引用:2013年普通高等学校招生全国统一考试理科数学(湖北卷)
12-13高三·江西景德镇·阶段练习
10 . 如图,平面
平面
,
是等腰直角三角形,
,四边形
是直角梯形,
,
,
,
,
分别为
,
的中点.
(I)求证:
平面
.
(II)求直线
和平面
所成角的正弦值.
(III)能否在
上找一点
,使得
平面
?若能,请指出点
的位置,并加以证明;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31effd1d3f7ce1f6e57be80c7f3af4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd190c4ce3e95d46416c7e635b5a8e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a22940cd2a129350c952ad7dc6db924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514ab3791431088948816c4ba7514c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d468887a6e318a953b9dcc93231db407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(II)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1220cf7442bc7658dbd74a845a62dfce.png)
(III)能否在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038b331d32c87fbd86c3accec0841fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2017/11/3/1809205128200192/1809771536965632/STEM/d1a673bf4913488d8148dd5a7282210c.png?resizew=173)
您最近一年使用:0次