如图,在三棱锥
中,
为等腰直角三角形,
,
.
(1)求证:
;
(2)若
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354c20e085fe1a99a8be03bd1d16b2f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a468dbc6b97e2941538cd428bb7a78d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/af19c0cf-8cd9-4eed-aece-7b19f7680796.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba75e9cbd1d32754a65acfaff1a944f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
22-23高二上·重庆长寿·期末 查看更多[4]
重庆市长寿区2022-2023学年高二上学期期末数学试题(A卷)(已下线)专题1-3 空间向量综合:斜棱柱、不规则几何体建系计算(讲+练)-【巅峰课堂】2023-2024学年高二数学热点题型归纳与培优练(人教A版2019选择性必修第一册)(已下线)模块二 专题2 利用空间向量解决不方便建立坐标系的方法 期末终极研习室(高二人教A版)(已下线)期末真题必刷压轴60题(23个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
更新时间:2023-06-20 10:26:28
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】在四棱锥
中,底面
为菱形,
,
为
点的中点.
(1)若
,求证:
平面
;
(2)点
在线段
上,且
,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
平面
时,求
的值.
![](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/1701f27de6b1de45022d8862365b10d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/31551786-76c6-401b-8282-b41881ca5f20.png?resizew=171)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c51c4a1148587943fe9ba210f6141ee.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d49dc833a51302057b19db5f9b6e16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ef4b918d022644e812c610a7308019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,底面
为菱形,
分别是棱
的中点,且
平面
.
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573113505079296/1573113511321600/STEM/984ff11d177f4c07a0350b35184c86bb.png?resizew=201)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](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/a6d33ae90b2d49f19166b4da95144d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db61a563634c0c9ada2d2aa90bed1dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff94ae7692477febffe53b03f06e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573113505079296/1573113511321600/STEM/984ff11d177f4c07a0350b35184c86bb.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72221ee5b504d596ff799c0b356aa0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f129bc3e3b94149cbf6ac87effe863cc.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐3】如图,在正三棱柱
中,点
、
、
分别是
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/7359170c-55b0-460e-91de-6b600dcb8a1e.png?resizew=151)
(1)求证:
平面
;
(2)求证:
平面
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/7359170c-55b0-460e-91de-6b600dcb8a1e.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】在多面体
中,
为等边三角形,四边形
为菱形,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/4/16/2183537764392960/2183885050413056/STEM/502bdbd3c064444a8e6efcc145f857d2.png?resizew=131)
(1)求证:
;
(2)求点
到平面
距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04145320203328b99ada7a2ebc88a80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557e96f7ef7c78a64c48305546cbb94f.png)
![](https://img.xkw.com/dksih/QBM/2019/4/16/2183537764392960/2183885050413056/STEM/502bdbd3c064444a8e6efcc145f857d2.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,正四棱锥
的高为6,
,且M是棱
上更靠近C的三等分点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/246e6f43-9f78-4937-956a-e95d651df97c.png?resizew=153)
(1)证明:
;
(2)若在棱
上存在一点N,使得
平面
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/246e6f43-9f78-4937-956a-e95d651df97c.png?resizew=153)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)若在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a041e768d10a0d59d95e1bbef881261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】在我国,木工工艺源远流长,上到皇宫宫殿,下到桌椅板凳,拥有其独特的魅力与智慧.在制作物品时常利用废弃木料制作木锲,用以加固一些关键部位.如图,已知三棱柱
的所有棱长都相等,侧棱
底面
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a9e8e47f-01bf-4ab1-91c6-a0db94137ac9.png?resizew=129)
(1)求证:
;
(2)求平面
与底面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a9e8e47f-01bf-4ab1-91c6-a0db94137ac9.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6113ae20cd6c13b1d750cddd161afa.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在三棱柱
中,
,
,D,E分别是CB,CA的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/b13d9e2d-c34b-4c78-83db-681c10945d10.jpg?resizew=164)
(1)若平面
平面
,求点
到平面ABC的距离;
(2)若
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9332278351ab92e03e984e9279dd06a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45224f7eac9d0cef64bf28d93e7721a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec64454070a31334375468ad17d2eb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/b13d9e2d-c34b-4c78-83db-681c10945d10.jpg?resizew=164)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1225db7039505351a11f64841ec0af2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,ABCD是边长为3的正方形,DE⊥平面ABCD,AF
DE,DE=3AF,BE与平面ABCD所成角为60°.
(1)求二面角F-BE-D的余弦值;
(2)设点M是线段BD上一个动点,试确定点M的位置,使得AM∥平面BEF,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/993c64b0-0e05-473e-b3c5-83b8335e3545.png?resizew=147)
(1)求二面角F-BE-D的余弦值;
(2)设点M是线段BD上一个动点,试确定点M的位置,使得AM∥平面BEF,并证明你的结论.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】如图,四棱锥
的底面
为筝形,
于
点,
为
的五等分点,
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/87cd7a1a-151f-4b33-ade8-6f1b0fd4d2f0.png?resizew=183)
(1)求证:
;
(2)作出平面
与平面
所成二面角
的任意一条棱,并求该二面角
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/5762cefdf4b2edebd125c1e0620734bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd946dad8b716592833a7bc14045a6d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398fbc0610195cb3793a6520a160c59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9159748d09dc452605d7bffcec904f8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9d53c9f89997a16fd1b21493fc5b60.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/87cd7a1a-151f-4b33-ade8-6f1b0fd4d2f0.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0cbbcc3d79bf999588882e7b1b4324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次