1 . 在三棱锥
中,对棱
所成角为
,平面
和平面
的夹角为
,直线
与平面
所成角为
,点
为平面
和平面
外一定点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aa0b9869db50a9ab48cc32925d8e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aee6e4e9350a2665df8597ff8045bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
A.过点![]() ![]() ![]() |
B.过点![]() ![]() ![]() ![]() |
C.过点![]() ![]() ![]() ![]() |
D.过点![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
解题方法
2 . 如图,三棱锥
中,
,平面
平面ABC,M是棱SA上一点,满足
,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/5d228f2b-2a25-44cb-9b8d-8536848858ec.png?resizew=129)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6e6192cf24ada791c26c2d6d434069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b534a8bb927765aa9941fd916ad6c4e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/5d228f2b-2a25-44cb-9b8d-8536848858ec.png?resizew=129)
A.![]() |
B.记二面角![]() ![]() ![]() ![]() ![]() |
C.记![]() ![]() ![]() ![]() ![]() ![]() |
D.![]() |
您最近一年使用:0次
解题方法
3 . 平面四边形ABCD中,
.现将
沿着对角线BD翻折得到平面
,直线
与平面
、平面BCD所成角分别记作
,
,平面
与平面BCD所成角二面角为
,在翻折过程中,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd148d264bc9043396f777523e907aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd148d264bc9043396f777523e907aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f64fa38725c136504f723019a18dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93fa313adc4ac7608ba9449fd755212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd148d264bc9043396f777523e907aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8d4017e1a37acb0c8e00508be472b2.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
4 . 如图,已知锐二面角
的大小为
,
,
,
,
,
,
,C,D为AB,MN的中点,若
,记AN,CD与半平面
所成角分别为
,
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5da93b48-c954-4b9c-83c0-cdbe70696299.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bbd99327195520a4ca3ce3b9a0577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f64fa38725c136504f723019a18dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b6de90bb936cdb09629123100145d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16acea101c98a280a70c2fa0b2c04dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c9eb310d9d90592d7ea635e3e06bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47563acd8051da7d6c63ad9a3b6e7d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e296c176f79b449f14ab19b527d473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076056d278749c4cadf4b7cd08373f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dedfb482c0d7333a6900684045a0a610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93fa313adc4ac7608ba9449fd755212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8d4017e1a37acb0c8e00508be472b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5da93b48-c954-4b9c-83c0-cdbe70696299.png?resizew=185)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2021-06-04更新
|
1773次组卷
|
6卷引用:浙江省宁波中学2021届高三下学期适应性考试数学试题
浙江省宁波中学2021届高三下学期适应性考试数学试题湖南省长沙市第一中学2023届高三一模数学试题(已下线)专题11 点、直线、平面之间的位置关系-备战2022年高考数学学霸纠错(全国通用)(已下线)专题19 立体几何综合小题必刷100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)(已下线)2022年高考浙江数学高考真题变式题19-22题(已下线)2022年高考浙江数学高考真题变式题7-9题
5 . 如图,在三棱锥
中,
,
,
,
分别为
,
的中点,记平面
与平面
所成的角为
,直线
,
与平面
所成的角分别为
,
,若
,则( )
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725926881550336/2726033578508288/STEM/cb65ab7f-bec2-4844-8f80-0e7ecf600d09.png?resizew=223)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f64fa38725c136504f723019a18dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93fa313adc4ac7608ba9449fd755212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8d4017e1a37acb0c8e00508be472b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7adce0515ceafe2c7cfa2fe17b74ea58.png)
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725926881550336/2726033578508288/STEM/cb65ab7f-bec2-4844-8f80-0e7ecf600d09.png?resizew=223)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
名校
6 . 已知底面
为正方形的四棱锥
,
点的射影在正方形
内,且
到
的距离等于
的长,记二面角
的平面角为
,二面角
的平面角为
,二面角
平面角为
,则下列结论可能成立的是( )
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717327875112960/2718256538845184/STEM/3f8537c7-d13f-4b28-bbec-3213b302af8f.png?resizew=268)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399d731913a563e291b817831a0c678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717327875112960/2718256538845184/STEM/3f8537c7-d13f-4b28-bbec-3213b302af8f.png?resizew=268)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-05-10更新
|
740次组卷
|
6卷引用:浙江省绍兴市诸暨市2021届高三下学期5月适应性考试数学试题
浙江省绍兴市诸暨市2021届高三下学期5月适应性考试数学试题(已下线)【新东方】【2021.5.19】【SX】【高三下】【高中数学】【SX00112】(已下线)专题9.立体几何与空间向量 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》浙江省温州市乐清市知临中学2020-2021学年高二下学期期末数学试题(已下线)2022年高考浙江数学高考真题变式题19-22题(已下线)2022年高考浙江数学高考真题变式题7-9题
解题方法
7 . 如图,在矩形
中,
,现将
沿
折至
,使得二面角
为锐角,设直线
与直线
所成角的大小为
,直线
与平面
所成角的大小为
,二面角
的大小为
,则
,
,
的大小关系是( )
![](https://img.xkw.com/dksih/QBM/2020/8/26/2536414096990208/2542989924761600/STEM/390f641e04854d779b5c7866a4d070bb.png?resizew=214)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ea25ef38e4afa8f75ffd0842890289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc66a96c1297e7068e987e0e70723e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bf2517bc0b55ab99049feb741eef85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/2020/8/26/2536414096990208/2542989924761600/STEM/390f641e04854d779b5c7866a4d070bb.png?resizew=214)
A.![]() | B.![]() | C.![]() | D.不能确定 |
您最近一年使用:0次
名校
解题方法
8 . 如图,等腰直角三角形
的斜边
为正四面体
的侧棱,直角边
绕斜边
旋转,则在旋转的过程中,有下列说法:
①四面体
的体积有最大值和最小值;
②存在某个位置,使得
;
③设二面角
的平面角为
,则
.
正确命题的序号是
______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519171913875456/2519201541398528/STEM/50937ca6-efb1-4a30-8a50-15654f76583c.png?resizew=304)
①四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42020cfacd62b300cad053981bab9e0b.png)
②存在某个位置,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
③设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d87b527147cb8dbb475bcefc0da2e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df1d9dcf1be61e7fa0d74ca9b70a5bc.png)
正确命题的序号是
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519171913875456/2519201541398528/STEM/ef9cda5e20f14506b80f1156c04792cf.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519171913875456/2519201541398528/STEM/59c46a42695d43f681dd46f89bc2aa44.png?resizew=13)
您最近一年使用:0次
2020-08-02更新
|
629次组卷
|
3卷引用:浙江省宁波市效实中学2020届高三下学期6月高考模拟数学试题
浙江省宁波市效实中学2020届高三下学期6月高考模拟数学试题安徽省阜阳市太和第一中学2020-2021学年高二(奥赛班)上学期开学考试数学试题(已下线)练习5 2021年高考数学二轮小题专练(新高考)
9 . 如图,在
中,
,
,
分别是
的中点.将
沿
折成大小是
的二面角
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/2fb57d75-bc55-44d6-99d2-5ce44fde3f74.png?resizew=396)
(Ⅰ)求证:平面
平面
;
(Ⅱ)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fb7e47e7affbcc9949d6e82ed3481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd75c2244c18120b8fc35d5d309ab66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62b84abdc8493166034dbafb5f6cffb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/2fb57d75-bc55-44d6-99d2-5ce44fde3f74.png?resizew=396)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077236fc12b2a3c92b1bb5f7007501b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52856669e6adf246c92923b4bb120d91.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5fc547cd267d76463fb8820749b59b.png)
您最近一年使用:0次