2019高三·全国·专题练习
名校
解题方法
1 . 如图,在三棱锥P-ABC中,
,D是BC的中点,PO⊥平面ABC,垂足O落在线段AD上,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/316c63cc-2ce9-41ee-b348-086a0691951a.png?resizew=215)
(1)求证:AP⊥BC;
(2)若点M是线段AP是一点,且
.试证明平面AMC⊥平面BMC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03bd70875715c32418d4a8a4f6c37c46.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/316c63cc-2ce9-41ee-b348-086a0691951a.png?resizew=215)
(1)求证:AP⊥BC;
(2)若点M是线段AP是一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3432d20e661779ddcefda76afcc2ac.png)
您最近一年使用:0次
2022-09-21更新
|
1148次组卷
|
10卷引用:河南省焦作市博爱县第一中学2023-2024学年高三上学期定位考试数学试题
河南省焦作市博爱县第一中学2023-2024学年高三上学期定位考试数学试题河南省许昌高级中学2022-2023学年高三上学期定位考试数学试题(已下线)专题8.6 空间向量及空间位置关系(讲)【理】-《2020年高考一轮复习讲练测》(已下线)专题8.6 空间向量及其运算和空间位置关系(精讲)--2021年高考数学(理)一轮复习讲练测北师大版(2019) 选修第一册 突围者 第三章 第四节 课时2 用向量方法讨论立体几何中的位置关系2023版 北师大版(2019) 选修第一册 突围者 第三章 第四节 课时2 用向量方法讨论立体几何中的位置关系(已下线)9.5 空间向量与立体几何(已下线)专题1.5 空间向量的应用【十大题型】-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)1.4.1.3 空间中直线、平面的垂直练习(已下线)考点10 空间向量的应用 2024届高考数学考点总动员【练】
名校
解题方法
2 . 对于问题“求证方程
只有一个解”,可采用如下方法进行证明“将方程
化为
,设
,因为
在
上单调递减,且
,所以原方程只有一个解
”.类比上述解题思路,则不等式
的解集是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c18c032d75893db45e61e6c4eb0d4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c18c032d75893db45e61e6c4eb0d4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cfb1e9557770560280b5248ae2d0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856491b01dab707170d83a1bc4b1f257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec65a2bec3d4296c613a80b3ae41d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2197c1c9e5e09713fe45dc1e73edf509.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2022-08-07更新
|
928次组卷
|
7卷引用:湘豫名校联考2022-2023学年高三上学期数学(文)8月入学摸底考试试题
3 . 我们学习过利用用尺规作图平分一个任意角,而“利用尺规作图三等分一个任意角”曾是数学史上一大难题,之后被数学家证明是不可能完成的,人们根据实际需要,发明了一种简易操作工具——三分角器.图1是它的示意图,其中
与半圆
的直径
在同一直线上,且
的长度与半圆的半径相等;
与
重直于点
足够长.使用方法如图2所示,若要把
三等分,只需适当放置三分角器,使
经过
的顶点
,点
落在边
上,半圆
与另一边
恰好相切,切点为
,则
就把
三等分了.为了说明这一方法的正确性,需要对其进行证明.如下给出了不完整的“已知”和“求证”,请补充完整,并写出“证明”过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/62a403f1-c232-4d37-a853-0c1ecfc8e5d5.png?resizew=355)
已知:如图2,点
在同一直线上,
垂足为点
,
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529c8336c1a523cccbdda7cf183cf219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f30095577dc714634354f5ad27715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f30095577dc714634354f5ad27715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04122fc1074cff7e73beea9c2ec76ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f30095577dc714634354f5ad27715.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/62a403f1-c232-4d37-a853-0c1ecfc8e5d5.png?resizew=355)
已知:如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7d41f6e9ebcd509b0c3446029d9ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833b91a24eb0fe0b2ee960193e83065d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
求证:
您最近一年使用:0次
4 . (1)设
,
,
都是正数,求证:
;
(2)证明:求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533937a08d1ed87594ac52c658be9649.png)
(2)证明:求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
您最近一年使用:0次
2019-06-20更新
|
1180次组卷
|
4卷引用:河南省林州市林虑中学2019-2020学年高二下学期开学检测数学(文)试题
名校
5 . 已知如图,在直三棱柱
中,
,且
,
是
的中点,
是
的中点,点
在直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ca1ab9c4-0335-456e-9513-c4f185296ab1.png?resizew=180)
(1)若
为
中点,求证:
平面
;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fe926770d2354e172dec02f5ce2efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ca1ab9c4-0335-456e-9513-c4f185296ab1.png?resizew=180)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d4f20da6ea72be561d73239e88739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afbdf49ccb1a8c34aba401f39fa095e.png)
您最近一年使用:0次
2019-02-13更新
|
636次组卷
|
4卷引用:2015-2016学年河南省信阳高中高一下学期开学考试数学卷
名校
6 . 如图,在三棱锥
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/c49f0574-ff3e-40e5-83c1-718d926d7753.png?resizew=161)
(1)求证:
;
(2)求二面角
平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48f1f0da5854716a873c9bd072693e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/c49f0574-ff3e-40e5-83c1-718d926d7753.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c909cd1b6f3fa1ec39eb245e8f5c11c.png)
您最近一年使用:0次
2024-01-29更新
|
186次组卷
|
3卷引用:河南省焦作市博爱县第一中学2024届高三下学期开学摸底考试数学试题
名校
7 . 如图在四棱锥
中,底面四边形
内接于圆
,
是圆
的一条直径,
平面
,
,
为
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afe4a56c1bd9fbe4850410e4133bd24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/1fa9f0f6-282e-483e-9a9c-5c376a92e477.png?resizew=160)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若二面角
的正切值为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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/1bae7599ad243c12d94325ad917f0a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afe4a56c1bd9fbe4850410e4133bd24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/1fa9f0f6-282e-483e-9a9c-5c376a92e477.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2024-01-05更新
|
436次组卷
|
2卷引用:河南省南阳市第一中学校2023-2024学年高二下学期开学考试数学试题
名校
解题方法
8 . 已知在
中,角
所对的边分别为
.
(1)若
,证明:
是等腰三角形;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f968093047600177a9113579b2ad9578.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2bac1c90ae56da48347335e888a282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5658e98892d447bf4559cd2f5567b043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2024-03-06更新
|
634次组卷
|
3卷引用:河南省九师联盟2024届高三上学期2月开学考试数学试卷
9 . 如图,在四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62bb88802effeef9bf6697edd2b06ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/4c1496a9-3964-48df-8827-a2b874a3e344.png?resizew=145)
(1)证明:
为等腰三角形;
(2)若平面
平面
,直线
与平面
所成角的正弦值为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62bb88802effeef9bf6697edd2b06ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51b89f545616ef48f3706850107ad95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac8a42591124ace3a0ad389d563d839.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/4c1496a9-3964-48df-8827-a2b874a3e344.png?resizew=145)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306b9504b52df5ad6697fa87200e8a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748ce363bf0d656545db3cc6c8d01690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
10 . 已知函数
.
(1)讨论函数
的单调性;
(2)当
时,若
且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4289047be9768c8d25f860fc70389c73.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
您最近一年使用:0次