如图,在三棱柱
中,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/6/2522228871946240/2522873486934016/STEM/8ff59dd524f344759e9948a6517564f9.png?resizew=147)
(1)求证:
平面
;
(2)点
在线段
上运动,求
与
所成角的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25e8fc3dda4f8b45491514b6e22a962.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/3f3be3dcde7b744f420a588cb8dd5b01.png)
![](https://img.xkw.com/dksih/QBM/2020/8/6/2522228871946240/2522873486934016/STEM/8ff59dd524f344759e9948a6517564f9.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231673dd67ab79d3c5da73904ceade1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a604466a9c8d10d557b3dfc43b547065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
19-20高二下·上海浦东新·期末 查看更多[4]
(已下线)上海市华东师范大学第二附属中学2019-2020学年高二下学期期末数学试题(已下线)高二期末押题03-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)专题3.4 空间直线与平面【易错题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)专题01 空间向量与立体几何的典型题(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)
更新时间:2020-08-07 20:22:09
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,正方形
的边长为4,点
,
分别为
,
的中点,将
,
,分别沿
,
折起,使
,
两点重合于点
,连接
.
(1)求证:
平面
;
(2)求
与平面
所成角的正弦值.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6fdadad5411ba41fae9277326f49cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9806df6df27bf715c81c4a93fc6517c5.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e90beb1c2ec9ee9ef9f879e2c6521a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6790a6927c746dd1373770912dc954ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
![](https://img.xkw.com/dksih/QBM/2018/2/25/1890011384078336/1893422865506304/STEM/e0d77cf351174363a796ef289b35e3d2.png?resizew=473)
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名校
【推荐2】如图所示,在四棱锥
中,底面ABCD为直角梯形,
,
,
,点E为AD的中点,
,
平面ABCD,且
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/2/6df64070-ba5f-435a-8896-6cbebfd347ae.png?resizew=185)
(1)求证:
;
(2)线段PC上是否存在一点F,使二面角
的余弦值是
?若存在,请找出点F的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e3296db9e9183be1b4e1eeb3d2eb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd54724fcdc9c17b35d31c6ba599c93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17622ea6f6f5afd1ad817a557e5889d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405bcc86f32954ee2ea287f35b6946ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/2/6df64070-ba5f-435a-8896-6cbebfd347ae.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4125524caac016727c80d2722c5ba3.png)
(2)线段PC上是否存在一点F,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b8c75b0e52a073e9271ed93465b861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9786d2ec9acadce968ce77d33d120d68.png)
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解答题-问答题
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【推荐3】如图,在四棱锥
中,底面
是正方形,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ce2e773ee3f553baf5d56582c6ade1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/ad0de17a-803f-4bfc-8aeb-61252cf944dd.png?resizew=184)
(1)证明:
平面
;
(2)若
是
的中点,
是棱
上一点,且
平面
,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/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ce2e773ee3f553baf5d56582c6ade1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/ad0de17a-803f-4bfc-8aeb-61252cf944dd.png?resizew=184)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281177cc5c7e6294a474dc64ee02aa29.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】如图,在直四棱柱
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/1be4fe13-c780-4e17-8811-b8e0dd8c63e4.png?resizew=128)
(1)证明:
.
(2)若
,四边形
的面积为
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0424446817f60c18f8e4e3cc202ad99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36dc59be52ecb9d31f86a148e53ab43.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/1be4fe13-c780-4e17-8811-b8e0dd8c63e4.png?resizew=128)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442beba7ef17d73029f5aeff3d944c04.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ee160c2700328be5b2ff970e0f81b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
您最近一年使用:0次
解答题-证明题
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(0.65)
名校
解题方法
【推荐2】如图,三棱锥
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/7d7c7240-9578-41f9-8d5a-e52677db6229.png?resizew=133)
(1)求证:
;
(2)求点
点平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41f231971dfbceec98be731b808a0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c0e126d1dcdb7aa38a41214187716e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/7d7c7240-9578-41f9-8d5a-e52677db6229.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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解答题-证明题
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适中
(0.65)
解题方法
【推荐1】四棱锥
中,底面
是正方形,
,
,
是
的中点.
(1)求直线
与直线
所成角的余弦值;
(2)求证:
平面
;
(3)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/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65692d5558690a62f5f15d1b797f3201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/a3f41e42-cda8-4bf6-84c0-9fb1ab27ae68.png?resizew=160)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
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解题方法
【推荐2】已知直三棱柱
中,
为正三角形,
,点
在棱
上,且
,
平面AEF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/14d22434-d47e-4eb4-9d1c-ce547e5b66ab.png?resizew=145)
(1)求证:F为BC的中点;
(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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f41d364b55d88688cd1f571ed231228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05931cb74b16f5afbf58f41dfa9abe3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f94bf6140206c527ca23425ede214d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/14d22434-d47e-4eb4-9d1c-ce547e5b66ab.png?resizew=145)
(1)求证:F为BC的中点;
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d061bf4e0c0fc7dbae8f13d1d603de.png)
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