1 . 如图,在多面体
中,平面
平面
,四边形
为正方形,四边形
为梯形,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/0911cb29-c63c-459a-a253-5688566270ed.png?resizew=190)
(Ⅰ)求证:
平面
;
(Ⅱ)求证:
平面
;
(Ⅲ)在线段
上是否存在点
,使得
平面
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0254c51c4e3e5ca7190cb4cd97defbb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/0911cb29-c63c-459a-a253-5688566270ed.png?resizew=190)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(Ⅲ)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75445760eb6944d4c380707bc83ab36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf38d5288cbde3baf715bd0ca6c4dadb.png)
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5卷引用:北京市朝阳区2018-2019学年高一下学期期末数学试题
名校
2 . 已知直线
与圆
交于
两点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd157ecda5e29b3b0d84b98ee254fefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd89a03660c85fb78bd7fe82ee3068c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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6卷引用:北京市朝阳区2018-2019学年高一下学期期末数学试题
名校
3 . 已知长方体
的外接球体积为
,且
,则直线
与平面
所成的角为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62817cb57b7c7a18d6fe0f3c47cf32f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141ef400af3ec09829c4a640867acea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
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5卷引用:湖南省衡阳市第八中学2018-2019学年高二下学期期末数学(文)试题
4 . 如图,在平行六面体
中,底面
是菱形,四边形
是矩形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/564ec4c1-c0f2-45b2-a491-407ba9001514.png?resizew=201)
(1)求证:
;
(2)若
点
在棱
上,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/564ec4c1-c0f2-45b2-a491-407ba9001514.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417104247ce266ae42c3a9860f387272.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d13039125858b5d0685740505bf166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb45845b2259bb4d10a56f568554cb0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f388690d28808e81e3c3cedb1d1755fd.png)
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4卷引用:福建省厦门市实验中学2018-2019学年高二第二学期期末理科数学试题
福建省厦门市实验中学2018-2019学年高二第二学期期末理科数学试题福建省厦门市2018-2019学年高二下学期期末考试数学(理)试题宁夏银川三沙源上游学校2019-2020学年高二上学期第二次月考数学(理)试题(已下线)大题专项训练16:立体几何(二面角)-2021届高三数学二轮复习
名校
5 . 米勒问题,是指德国数学家米勒1471年向诺德尔教授提出的有趣问题:在地球表面的什么部位,一根垂直的悬杆呈现最长(即可见角最大?)米勒问题的数学模型如下:如图,设
是锐角
的一边
上的两定点,点
是边
边上的一动点,则当且仅当
的外接圆与边
相切时,
最大.若
,点
在
轴上,则当
最大时,点
的坐标为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/80941c05-e688-4c0b-a293-f67044b4c790.png?resizew=260)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.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/dec1f8a14b2c1570aa076166017ccf33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75217a4935f223f16cfefa3e04cd5fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/80941c05-e688-4c0b-a293-f67044b4c790.png?resizew=260)
A.![]() | B.![]() |
C.![]() | D.![]() |
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4卷引用:江苏省泰州市2018-2019学年高一第二学期期末考试数学试题
江苏省泰州市2018-2019学年高一第二学期期末考试数学试题山东省潍坊市潍坊第一中学2021-2022学年高二上学期期末数学试题(已下线)专题3 最佳视角 米勒定理【练】(已下线)专题07 直线与圆的位置关系7种常见考法归类(2)
名校
6 . 已知三棱锥
中,
两两垂直,且
,则三棱锥
外接球的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bb1063e139610045f3bca5ca0b2766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50094bfee564d9c1b03088ac2ece28c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:江苏省镇江市2018-2019学年高一下学期期末数学试题
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7 . 若直线
过点
,且平行于过点
和
的直线,则直线
的方程为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad42625f296d2a4b65180e2f7b776beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe3f68cbbcc907caab5083d08df301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b04fcdd2bac112b60b86fa056533ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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4卷引用:2019年广东省广州市海珠区高一下学期期末考试数学试题
2019年广东省广州市海珠区高一下学期期末考试数学试题广东省广州市2018-2019学年高一下学期期末数学试题广东省广州市第一一三中学2019-2020学年高一下学期期中数学试题(已下线)专题13 两条直线的位置关系6种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教B版2019选择性必修第一册)
名校
8 . 已知直线
,若
成等差数列,则当点
到直线
的距离最大时,直线
的斜率是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29fa0e0526598c4140789f6328daac9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4754fbe523ca63eba3810a3f88f37df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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4卷引用:浙江省丽水市2018-2019学年高一下学期期末数学试题
浙江省丽水市2018-2019学年高一下学期期末数学试题河北省秦皇岛市卢龙县中学2019-2020学年高二上学期期中数学试题(已下线)专题2.4+数列单元测试(重点卷)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)甘肃省庆阳市宁县第二中学2019-2020学年高二上学期第一次月考数学试题
名校
9 . 如图,在长方体
中,
,
,
,沿该长方体对角面
将其截成两部分,并将它们再拼成一个新的四棱柱,那么这个四棱柱表面积的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/7003c5eb-f480-4659-aab3-77c4d8b2a9d8.png?resizew=160)
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10 . 如图,某海面上有
、
、
三个小岛(面积大小忽略不计),
岛在
岛的北偏东
方向
处,
岛在
岛的正东方向
处.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/1b789c13-d0c6-4021-a1fe-bdb839f64022.png?resizew=240)
(1)以
为坐标原点,
的正东方向为
轴正方向,
为单位长度,建立平面直角坐标系,写出
、
的坐标,并求
、
两岛之间的距离;
(2)已知在经过
、
、
三个点的圆形区域内有未知暗礁,现有一船在
岛的南偏西
方向距
岛
处,正沿着北偏东
行驶,若不改变方向,试问该船有没有触礁的危险?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38092ae2fb52cfa5e0017c7eb73381fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe602366f921c3c0e58c3f524646be8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/1b789c13-d0c6-4021-a1fe-bdb839f64022.png?resizew=240)
(1)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e4917c34a4c4e654ace35eb65f179b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)已知在经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996bf3d35b6763cbc1a423b13a9df2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba80a2abb9e6a7fd35c5b4c4d20cf779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
您最近一年使用:0次
2019-07-05更新
|
628次组卷
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2卷引用:江苏省南通中学2018-2019学年高一5月月考数学试题