名校
解题方法
1 . 如图,在四棱锥
中,
,且
.点
是线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/e3579055-14be-4658-bb9d-b647030f29b1.png?resizew=178)
(1)当
平面
时,求
的值;
(2)点
是线段
上运动的过程中,能否使得二面角
的大小为
?若存在,求出
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006eabc4d46b28bced4011510489261a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76894e0861c36728a28d273ea6efba47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/e3579055-14be-4658-bb9d-b647030f29b1.png?resizew=178)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241a37fb1eff68a7133822b1b52d627e.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a833eb36d4b3ab4769d8d9b65d0755d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,在四棱锥
中,
为线段
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/627aa2a2-d226-49b0-bc3d-fd232584f344.png?resizew=165)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e6cbd1abfdcaf2856d90f73f006cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78002bca853929365a3f58082f3e7637.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/627aa2a2-d226-49b0-bc3d-fd232584f344.png?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
2023·全国·模拟预测
名校
3 . 如图,在几何体
中,四边形
是等腰梯形,四边形
是正方形,且平面
平面
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a68a008a22d5a8cea5fe8dcf31e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5f58d0919b618868df14add12c59ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d28eb567698a9467890bfaebb49c248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bfb639ad02a425d8e67ab046088ff5.png)
您最近一年使用:0次
2023-05-01更新
|
467次组卷
|
3卷引用:贵州省铜仁市2022-2023学年高二上学期1月期末质量监测数学试题
4 . 如图,在四棱锥
中,底面
为正方形,
是正三角形,侧面
底面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/c4f0ffef-2973-4beb-a5fe-66f8d8b8aa9b.png?resizew=219)
(1)求证:
平面
;
(2)求锐二面角
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/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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/c4f0ffef-2973-4beb-a5fe-66f8d8b8aa9b.png?resizew=219)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe3c2a946dfa7a6c01954fa07dfe79f.png)
您最近一年使用:0次
名校
5 . 如图,四棱锥P-ABCD中,底面ABCD为平行四边形,PA⊥平面ABCD,点H为线段PB上一点(不含端点),平面AHC⊥平面PAB.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/0b564bba-30c1-4c5a-8ca6-bbd6bc22b0e6.png?resizew=187)
(1)证明:
;
(2)若
,四棱锥P-ABCD的体积为
,求二面角P-BC-A的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/0b564bba-30c1-4c5a-8ca6-bbd6bc22b0e6.png?resizew=187)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
2023-02-19更新
|
863次组卷
|
5卷引用:贵州省遵义市2022-2023学年高二上学期期末数学试题
贵州省遵义市2022-2023学年高二上学期期末数学试题(已下线)专题8.16 空间角大题专项训练(30道)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)(已下线)专题8.13 空间直线、平面的垂直(二)(重难点题型精讲)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)安徽省定远中学2023届高三下学期第一次模拟检测数学试卷河南省焦作市博爱县第一中学2022-2023学年高二下学期5月月考数学试题
解题方法
6 . 如图,正四棱柱
中,M为
中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/35871297-e066-4a26-b80b-683be7485516.png?resizew=167)
(1)证明:
平面
;
(2)求DM与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95196d4658088f565e495c005cfed5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/35871297-e066-4a26-b80b-683be7485516.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7bfc1d0b50681765bd3fa6d5920ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求DM与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688111eb4ebfeeec83140dd86c1e805b.png)
您最近一年使用:0次
2023-02-19更新
|
330次组卷
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2卷引用:贵州省遵义市2022-2023学年高二上学期期末数学试题
名校
7 . 如图,在四棱锥
中,平面
平面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/e01adf8d-b2f5-4da6-b00e-49ec21a15e8f.png?resizew=179)
(1)证明:
;
(2)求平面
与平面
夹角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448cbac9a1ef3de7538a6b30cdc39582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d11dd7422f4703763abc23d83c7584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a96e28da84438fcfe1ef138721de4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/e01adf8d-b2f5-4da6-b00e-49ec21a15e8f.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dd55b363934b4b89b381b985e22f39.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
您最近一年使用:0次
2023-02-16更新
|
288次组卷
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2卷引用:贵州省六盘水市2022-2023学年高二上学期期末教学质量监测数学试题
名校
8 . 如图所示,直三棱柱
的底面是边长为2的正三角形,且直三棱柱
的体积为
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/a0ad21ec-f8a0-4ff1-a45a-362a371cc3fb.png?resizew=164)
(1)证明:
平面
;
(2)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/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/a0ad21ec-f8a0-4ff1-a45a-362a371cc3fb.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231673dd67ab79d3c5da73904ceade1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d03fa3190156229637a3b1d6615c39.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34254a0f46f943e1c720f0eefccd28eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
您最近一年使用:0次
9 . 如图,在正三棱柱
中,
,D,E分别是棱BC,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/ca2a6082-d5bd-483a-a919-cac777e289f0.png?resizew=142)
(1)证明:平面
平面
.
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/ca2a6082-d5bd-483a-a919-cac777e289f0.png?resizew=142)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512201cb07fd1df01985baa7a3c71c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a98287a302228ece1fa53c5c66c590f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a98287a302228ece1fa53c5c66c590f.png)
您最近一年使用:0次
2023-01-19更新
|
350次组卷
|
5卷引用:贵州省黔东南州2023届高三上学期复习统一检测(期末)数学(文)试题
贵州省黔东南州2023届高三上学期复习统一检测(期末)数学(文)试题江西省部分学校2023届高三上学期1月联考数学(文)试题(已下线)模块三 专题8(立体几何初步)拔高能力练(北师大版)(已下线)模块三 专题7 大题分类练(立体几何初步)拔高能力练(人教A)(已下线)模块三 专题8大题分类练(立体几何初步)拔高能力练(苏教版)
名校
10 . 如图,已知三棱柱
中,平面
平面
,
,
,
,E,F分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/d9d3d69e-84c2-4178-b21f-75b0902eee96.png?resizew=189)
(1)证明:
;
(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/df00cdf77ed39ca5a0b305861a693142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4020513c097ba34df4b42e297f892cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24261d71106c4a78fb187a1171bb6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204ffc27244d93a36696a938c1d85798.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/d9d3d69e-84c2-4178-b21f-75b0902eee96.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0538d15f20488fe686a92c79709c928.png)
您最近一年使用:0次
2023-01-19更新
|
303次组卷
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3卷引用:贵州省铜仁市2023届高三上学期期末质量监测数学(理)试题