解题方法
1 . 三棱台
中,
为正三角形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/72ae19f7-c65b-4294-871a-74bf644d898a.png?resizew=196)
(1)求证:
;
(2)若二面角
的平面角大小为
,且在线段
上有点D使得平面
平分四面体
的体积,求
与面
所成角的正弦值.
![](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/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295640e886a3a29c5159a93fa287ee68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b24e120b14d76a6ad877ac67ba8887f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13746be2742d09bc83769473ef78af1f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/72ae19f7-c65b-4294-871a-74bf644d898a.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7768503b1ad4775258b2f1a71c413086.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047b9fd4020265766074c80a7f8ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddc76d96d6951ebfef3fe63892a1114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daca141813f89060fdfaca5caeaac9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d04812fd787f9677100063fcdbd3970.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,在四棱锥
中,
为正三角形,
,且
,M为PC的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/300b10e4-ddf3-4d01-ae76-b05dea8952e4.png?resizew=140)
(1)平面
平面
,求证:
.
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
平面PAD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580b59a20066bf3a2fe6da21f444eee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668fe95dcffae1cfef930f8ca29b939f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/300b10e4-ddf3-4d01-ae76-b05dea8952e4.png?resizew=140)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1084a42a7b7600ac9651a023de6d3401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49b2f51d88feb313b735e8077117abb.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
您最近一年使用:0次
2022-11-05更新
|
819次组卷
|
4卷引用:浙江省温州十校联合体2022-2023学年高二上学期期中联考数学试题
浙江省温州十校联合体2022-2023学年高二上学期期中联考数学试题四川省成都市实验外国语学校2022-2023学年高三上学期11月月考文科数学试题(已下线)第29讲 线面垂直证线线平行和垂直2种题型(已下线)第28讲 空间直线、平面的垂直2种题型(2)
3 . 如图,已知四边形ABCD是菱形,
,
绕着BD顺时针旋转
得到
,E是PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/02644d21-2be4-404f-a54f-c470e8bffe9a.jpg?resizew=194)
(1)求证:
平面BDE;
(2)求直线AP与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/02644d21-2be4-404f-a54f-c470e8bffe9a.jpg?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1666b45ed176d648dd1764f4a2dbd73.png)
(2)求直线AP与平面PBC所成角的正弦值.
您最近一年使用:0次
4 . 如图,在
中,
,
,且
,
分别为
,
的中点.现将
沿
折起,使点
到达点
的位置,连接
,
,
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/e41a6b24-3886-4cf9-8568-0f03432572c9.png?resizew=290)
(1)证明:
平面
;
(2)若二面角
的余弦值为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f67985b822b482f804d56d5df049f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/e41a6b24-3886-4cf9-8568-0f03432572c9.png?resizew=290)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bf409052164064c2c00918ba6961cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308d48a439e5a8710f241abf7314b946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08e91d2fa9519a5f48d488176700499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2b862d3d984915ed0ab9c03a8b1211.png)
您最近一年使用:0次
5 . 如图1,在直角三角形
中,
为直角,
在
上,且
,作
于
,将
沿直线
折起到
所处的位置,连接
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/a490ef69-6007-4cfd-b1c3-777a8de61b1a.png?resizew=454)
(1)若平面
平面
,求证:
;
(2)若二面角
为锐角,且二面角
的正切值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f859d73bc9ef3159cca595c73a524cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a2a8c516b154fb34109f7a17555dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5cf9e5f493f8cc9bd441d928b2d25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/a490ef69-6007-4cfd-b1c3-777a8de61b1a.png?resizew=454)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac48b9ac8efbf41d6ab5242d247bd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03d3b1a7b201f380f960db4b6ff2943.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966903d099ea0534ab7019d9346f89c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1f04ff8d19d4a3e0ffe4504b961b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c76e558109d9b8dd700c1a7f9cc73ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
您最近一年使用:0次
2022-12-16更新
|
1856次组卷
|
7卷引用:浙江省丽水市青田县船寮高级中学2021-2022学年高一下学期第二次月考数学试题
浙江省丽水市青田县船寮高级中学2021-2022学年高一下学期第二次月考数学试题浙江金华第一中学2022-2023学年高三下学期3月月考数学试题广东省深圳市高级中学2022-2023学年高二下学期开学考试数学试题(已下线)专题10 空间角、距离的计算-期中期末考点大串讲(苏教版2019必修第二册)安徽省马鞍山市红星中学2022-2023学年高一下学期5月月考数学试卷湖北省武汉市第十一中学2022-2023学年高一下学期6月月考数学试题(已下线)专题3 由二面角求线段长问题(解答题一题多解)
6 . 在三棱锥
中,
平面
,
,
,F为棱PC上一点,满足
于F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/4af1f726-2cc1-4299-a366-238127332699.png?resizew=169)
(1)求证:平面
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2b7ac585f315b881360285a23fb83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392902d611863c6908a48e696e7bd8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/4af1f726-2cc1-4299-a366-238127332699.png?resizew=169)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf84ed033bd035c2fe7552badd5e447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
名校
7 . 如图,在三棱台
中,
,
,侧面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/ea694d84-3205-4e58-8d6a-c5a1d52b44e7.png?resizew=175)
(1)求证:
面
;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893ab62556f18225ee445258584bf004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91b02ae9df63950c2b4152fd1edc091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/ea694d84-3205-4e58-8d6a-c5a1d52b44e7.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe6776d7820afb6ef539566155320ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2022-06-27更新
|
918次组卷
|
3卷引用:浙江省温州市2021-2022学年高一下学期期末数学试题(B卷)
浙江省温州市2021-2022学年高一下学期期末数学试题(B卷)辽宁省铁岭市昌图县第一高级中学2021-2022学年高一下学期期末数学试题(已下线)期末专题05 立体几何大题综合-【备战期末必刷真题】
名校
8 . 如图,在等腰梯形
中,
,在等腰梯形
中,
,将等腰梯形
沿
所在的直线翻折,使得
,
在平面
上的射影恰好与
重合.
平面
;
(2)求直线
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/873d7c7185a904b8ed550902ec1f5820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725aa3cd046b43f38926fc7c595d9046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2022-06-22更新
|
1096次组卷
|
3卷引用:浙江省杭州市2021-2022学年高一下学期期末数学试题
9 . 已知
平面
,
,
是正三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/73ec75ef-e1eb-4c2b-8d9f-cc1f7cd5a83d.png?resizew=192)
(1)求证:平面
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1ff2afbc771a6708ca771f450b1997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f779e7f5f53e4377b9a0a8e945d562.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/73ec75ef-e1eb-4c2b-8d9f-cc1f7cd5a83d.png?resizew=192)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370148e9147aa25c60a07ab4ad46e83d.png)
您最近一年使用:0次
名校
解题方法
10 . 已知圆
,点
为直线
上一动点,过点
引圆
的两条切线,切点分别为
.
(1)若点
的坐标为
,求直线
的方程;
(2)求证:直线
恒过定点
,并求出该定点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36385f4bd89d51b935b1cfcbe6331537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82be1703fea194fbd9a520f879e16b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
2022-12-05更新
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392次组卷
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3卷引用:浙江省绍兴市越州中学2022-2023学年高二上学期期中测试(一)数学试题