1 . 已知四棱锥
,
,
,
,△
为等腰直角三角形,面
面
,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983648403816448/2986522860388352/STEM/73e06c02dfc04d7495fb4edade158e72.png?resizew=174)
(1)求证:
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d734dedabe1864d85b647681e8887187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b88e9a4616bf02cc44fefd7eaf1e4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983648403816448/2986522860388352/STEM/73e06c02dfc04d7495fb4edade158e72.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edadd9995393ece0d7b7bf4801504bd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
解题方法
2 . 如图,在空间四面体ABCD中,AB⊥BC,BC⊥CD,点P是BC边上的动点(不包括端点),记AB与CD所成角为
,AP与平面BCD所成角为
,AP与CD所成角为
,则( )
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982748836143104/2985595569332224/STEM/ef8b5378-632f-4d63-920c-b852a8092f42.png?resizew=141)
![](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/3e8d4017e1a37acb0c8e00508be472b2.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982748836143104/2985595569332224/STEM/ef8b5378-632f-4d63-920c-b852a8092f42.png?resizew=141)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 某地举办数学建模大赛,本次大赛的冠军奖杯由一个铜球和一个托盘组成,如图①,已知球的表面积为16
,托盘由边长为8的等边三角形铜片沿各边中点的连线垂直向上折叠面成,如图②,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975701297971200/2977372046327808/STEM/486a8391-a01b-40cc-805f-9dcaa79cf2c9.png?resizew=430)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2d1ecae9c649cc3c89f9ce0c063208.png)
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975701297971200/2977372046327808/STEM/486a8391-a01b-40cc-805f-9dcaa79cf2c9.png?resizew=430)
A.直线AD与平面DEF所成的角为![]() |
B.经过三个顶点A,B,C的球的截面圆的面积为![]() |
C.异面直线AD与CF所成角的余弦值为![]() |
D.球上的点到底面DEF的最大距离为![]() |
您最近一年使用:0次
2022-05-11更新
|
2433次组卷
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5卷引用:浙江省嘉兴市平湖市当湖高级中学2021-2022学年高一下学期5月阶段性测试数学试题
浙江省嘉兴市平湖市当湖高级中学2021-2022学年高一下学期5月阶段性测试数学试题山东省德州市2022届高考二模数学试题(已下线)重难点09五种空间向量与立体几何数学思想-2(已下线)专题3 “数学建模”类型(已下线)第七章 立体几何 专题3 组合体中的距离问题
解题方法
4 . 长方体
,
,
,若直线
与平面
所成角的正弦值为
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d20564320dc28e1b429ec389ccf309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756d4d8a7051af5dae3ef56cb9e47c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966351585132544/2970693335785472/STEM/758ba9e4-0fe7-4bfb-bd86-a1476f14f539.png?resizew=160)
您最近一年使用:0次
2022-05-02更新
|
504次组卷
|
4卷引用:浙江省金华市曙光学校2021-2022学年高一下学期第二次阶段考试数学试题
浙江省金华市曙光学校2021-2022学年高一下学期第二次阶段考试数学试题 浙江省温州市知临教育集团2021-2022学年高一下学期期中数学试题江苏省仪征市精诚高级中学2021-2022学年高一年级5月月考数学试题(已下线)专题09 立体几何中的角度、距离、体积问题-2021-2022学年高一数学下学期期末必考题型归纳及过关测试(人教A版2019)
名校
5 . 如图所示,在四棱锥
中,
是
上的一点,
,平面
平面
,
,
是等边三角形,已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/b10bcd1b-6028-48f9-875c-949c9c8e6165.png?resizew=172)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](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/a6569c61bfa235b6a13a80cc4dbf4706.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/c30f6595dd643813b11ad71df61a10dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e56523b5bff5512e99e8f8ea77db2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29673a6bbca1e43d072eaf8230577a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/b10bcd1b-6028-48f9-875c-949c9c8e6165.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954c584f9c868d235e0fc1debb14428d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2022-05-02更新
|
529次组卷
|
3卷引用:浙江省金华市曙光学校2021-2022学年高一下学期第二次阶段考试数学试题
解题方法
6 . 如图,在四棱锥
中,
是等边三角形,
平面
,
且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2022/3/18/2938939454816256/2943958259965952/STEM/bd565328d8aa428caa204df5bb171bb2.png?resizew=227)
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0787d2cb66d00c49d3348b52acd407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206cc20c5da920b954e67b3775733685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2022/3/18/2938939454816256/2943958259965952/STEM/bd565328d8aa428caa204df5bb171bb2.png?resizew=227)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f687c40c3b65923237e3a96ea593e65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d62d30d732c3c6ee3f0dd66d7059356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
2022-03-25更新
|
851次组卷
|
3卷引用:浙江省台州市玉环市玉城中学2021-2022学年高一上学期第二次月考数学试题
浙江省台州市玉环市玉城中学2021-2022学年高一上学期第二次月考数学试题(已下线)专题09 立体几何中的角度、距离、体积问题-2021-2022学年高一数学下学期期末必考题型归纳及过关测试(人教A版2019)2023版 湘教版(2019) 必修第二册 过关斩将 第4章 立体几何初步
7 . 如图,在矩形
中,
,
是
的中点,沿直线
将
翻折成
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936948533878784/2938919259635712/STEM/d8722bf2e419422a956ae824d7fb4041.png?resizew=313)
(1)求证:
;
(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/b7cf8addbe9e0a58e7a4d0406eef63b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf1490f8bd695ad195aa1a52fe36373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9785292a8e557ab9a4a9fffc23572a0a.png)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936948533878784/2938919259635712/STEM/d8722bf2e419422a956ae824d7fb4041.png?resizew=313)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f586ec271c8ba58611b4bb160ae1017.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
8 . 已知平面
,过空间一定点P作一直线l,使得直线l与平面
,
所成的角都是30°,则这样的直线l有______ 条.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
2022-02-15更新
|
216次组卷
|
2卷引用:浙江省杭州市2021-2022学年高二下学期2月月考数学试题
名校
9 . 如图,在四棱锥
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
.
![](https://img.xkw.com/dksih/QBM/2022/1/22/2900129606516736/2903690423599104/STEM/e855fe31-f188-457e-9dcb-8265b723a3af.png?resizew=200)
(1)证明:
平面
;
(2)在线段
上是否存在一点
,使直线
与平面
所成角的正弦值等于
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a97186359ccaf3e110a9c0195c4dac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464c079d3fb0312aac21fa6fa5140414.png)
![](https://img.xkw.com/dksih/QBM/2022/1/22/2900129606516736/2903690423599104/STEM/e855fe31-f188-457e-9dcb-8265b723a3af.png?resizew=200)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd92f594c348f7a956607f7b381cc22a.png)
您最近一年使用:0次
2022-01-27更新
|
1078次组卷
|
5卷引用:浙江省山河联盟2021-2022学年高二下学期3月联考数学试题
浙江省山河联盟2021-2022学年高二下学期3月联考数学试题浙江省杭州学军中学2021-2022学年高二上学期期末数学试题云南省昭通市下关一中、昭通一中2021-2022学年高二下学期见面考(开学考试)数学试题(已下线)江苏省苏锡常镇四市2023届高三下学期3月教学情况调研(一)数学试题变式题17-22陕西省西安市铁一中学2022-2023学年高一下学期期末数学试题
10 . 如图,在梯形
中,
,
,菱形
中,
,平面
垂直于平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/a4da50cb-7bc2-4efd-b87b-37f03e56f431.png?resizew=196)
(1)求证:
;
(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/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e70dccdfccce3bb76a145b6d9d5be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df7eccb2396d93fe3e037809877b9c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6160d4e567a1bfd3a6ee159067453579.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/a4da50cb-7bc2-4efd-b87b-37f03e56f431.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次