名校
解题方法
1 . 如图,在四棱锥
中,
底面
,
,底面
为边长为2的正方形,
为
的中点,则异面直线
与
所成的角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/9f79c8d3-9ff6-447d-9828-5f5764d1d36e.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/9f79c8d3-9ff6-447d-9828-5f5764d1d36e.png?resizew=165)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-11-04更新
|
2351次组卷
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14卷引用:山西省大同市灵丘一中、广灵一中2020-2021学年高一下学期期中联考数学试题
山西省大同市灵丘一中、广灵一中2020-2021学年高一下学期期中联考数学试题重庆市字水中学2020-2021学年高二上学期期末数学试题江苏省镇江市心湖2020-2021学年高二下学期3月月考数学试题(已下线)专练11 空间向量与立体几何综合检测(A卷)-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)福建省福州市闽侯县第一中学2021-2022学年高二10月月考数学试题(已下线)专题三 空间向量的应用-2021-2022学年高二数学同步单元AB卷(人教A版2019选择性必修第一册)青海省海南州中学2021-2022学年高二上学期第一次月考数学(理)试题吉林省四平市第一高级中学2021-2022学年高二上学期开学考试数学试题安徽省皖北名校2020-2021学年高二上学期第二次联考数学试题河北省深州市中学2020-2021学年高二上学期期中数学试题宁夏贺兰县景博中学2021届高三上学期统练(四)数学(文)试题(已下线)第二章+点、直线、平面之间的位置关系(基础过关)-2020-2021学年高一数学单元测试定心卷(人教版必修2)广西贺州市昭平中学2020-2021学年高一上学期第二次月考数学试题2023版 湘教版(2019) 选修第二册 过关斩将 全书综合测评
名校
解题方法
2 . 如图,在四棱锥
中,四边形
为平行四边形,
,E为PD的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460389481177088/2460430178164736/STEM/ac611929a87842b3a4be7f05365ab5f9.png?resizew=223)
(1)求证:
平面
;
(2)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/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20f858b16844788dfba97531442408e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf61838865ba48994946005c6191e47b.png)
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460389481177088/2460430178164736/STEM/ac611929a87842b3a4be7f05365ab5f9.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e231505648333857565accb0c3c898.png)
您最近一年使用:0次
2020-05-11更新
|
481次组卷
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4卷引用:山西省大同市2022届高三上学期学情调研测试数学(理)试题
名校
3 . 如图,在四棱锥
中,底面
是边长为2的菱形,
平面
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/a83285f1-67de-4d7e-a918-4dcf9edc5d3f.png?resizew=148)
(1)证明:
;
(2)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/45ceb34de734de1a16448e4e3ab5b562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/a83285f1-67de-4d7e-a918-4dcf9edc5d3f.png?resizew=148)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9829fc6685b59fdc609f32f30ebd9e6d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2ed7474932ac3959108f2b835acf98.png)
您最近一年使用:0次
2019-04-23更新
|
305次组卷
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4卷引用:山西省大同市灵丘一中、广灵一中2020-2021学年高二下学期期中联考数学(理)试题