10-11高二下·海南·期末
1 . 如图,锐角三角形ABC中,以BC为直径的半圆分别交AB、AC于点D、E,则△ADE与△ABC的面积之比为
![](https://img.xkw.com/dksih/QBM/2014/12/2/1571908314890240/1571908320280576/STEM/947f4e7e58ec42f2831e1a436e813735.png)
![](https://img.xkw.com/dksih/QBM/2014/12/2/1571908314890240/1571908320280576/STEM/947f4e7e58ec42f2831e1a436e813735.png)
A.cosA | B.sinA | C.sin2A | D.cos2A |
您最近一年使用:0次
2018高三·全国·专题练习
名校
2 . 已知函数
,若方程
恰有三个实数根,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ee975cd32e42962d574dcc23daab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe68aa8a21f26b6b9f6889369aa5905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-03-17更新
|
660次组卷
|
3卷引用:2-8 函数与方程(高效训练)-2019版导学教程一轮复习数学(人教版)
(已下线)2-8 函数与方程(高效训练)-2019版导学教程一轮复习数学(人教版)2017届福建省宁德市高三第一次(3月)质量检查数学理试卷山西省应县第一中学校2018-2019学年高二下学期期末考试数学(理)试题
名校
3 . 在平面直角坐标系中,将曲线
上的每一个点的横坐标保持不变,纵坐标缩短为原来的
,得到曲线
,以坐标原点
为极点,
轴的正半轴为极轴,建立极坐标系,
的极坐标方程为
.
(1)求曲线
的参数方程;
(2)过原点
且关于
轴对称的两条直线
与
分别交曲线
于
和
,且点
在第一象限,当四边形
周长最大时,求直线
的普通方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f917a2022014d9c19c29eeac84c74e2f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)过原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e478787ebfeb68a5a7594dbd9eecd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f90eb172dbd2ff7ae6f705801c0737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
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2017-04-15更新
|
1238次组卷
|
7卷引用:2017届河北省石家庄市高三一模考试(文科)数学试卷
2010高三·全国·专题练习
4 . 如图所示,过
外一点
作一条直线与
交于
,
两点,已知
,点
到
的切线长
,则弦
的长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fca8c94add435f4aefb933ffe55a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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5 . 已知直角三角形周长为
,一锐角平分线分对边为3:5两部分.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/15819737-6aa9-4c81-ac40-9cf2e8d0f6a7.png?resizew=128)
(1)求直角三角形的三边长;
(2)求两直角边在斜边上的射影的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2442fce668d789c1019394a11ffa6450.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/15819737-6aa9-4c81-ac40-9cf2e8d0f6a7.png?resizew=128)
(1)求直角三角形的三边长;
(2)求两直角边在斜边上的射影的长.
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6 . 选修4-1:几何证明选讲
四边形
内接于圆,
,过
点作圆的切线与
的延长线交于点
.
![](https://img.xkw.com/dksih/QBM/2016/12/14/1619428618551296/1619428619206656/STEM/73dfe253840543358f9da8e3c9dc2e2e.png)
(1)求证:
;
(2)若
,
,
,求
的长.
四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/12/14/1619428618551296/1619428619206656/STEM/73dfe253840543358f9da8e3c9dc2e2e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6bcbc08e45c3f6c7fd17c6b8094277.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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7 . 选修4-1:几何证明选讲
如图,
是半径为
的
上的点,
在点
处的切线交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573189629657088/1573189636128768/STEM/9210382d14fc4fe4964f02896a7c71e2.png)
(1)求证:
;
(2)若
为
的直径,求
的长.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4325d2ed3b44f94e5d5fc98af1aee4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573189629657088/1573189636128768/STEM/9210382d14fc4fe4964f02896a7c71e2.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e23a92f912a48c8750b6c9e6af86ff.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2016-12-05更新
|
149次组卷
|
2卷引用:2016届福建福州市高三上学期期末数学(理)试卷
8 . 选修4-1:几何证明选讲
如图,AB是⊙O的直径,AD,DE是⊙O的切线,AD,BE的延长线交于点C.
![](https://img.xkw.com/dksih/QBM/2016/10/16/1573072174120960/1573072180314112/STEM/f62b66247fad4e919be28a85272086cc.png)
(1)求证:
四点共圆;
(2)若
,CE=1,
30°,求
长.
如图,AB是⊙O的直径,AD,DE是⊙O的切线,AD,BE的延长线交于点C.
![](https://img.xkw.com/dksih/QBM/2016/10/16/1573072174120960/1573072180314112/STEM/f62b66247fad4e919be28a85272086cc.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be90d18409de7c324059f18a4fd9db7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db966856ec2cbe925bdf8ee29fc93611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d38dd5d46dc279bbe3c20ea4e03fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
9 . 选修4-1:几何证明选讲
如图,已知
是⊙
的直径,点
是⊙
上一点,过点
作⊙
的切线,交
的延长线于点
,过点
作
的垂线,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/be73ec72053a443dae4b399043b9fee5.png)
(1)求证:
为等腰三角形;
(2)若
,求⊙
的面积.
如图,已知
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/669ff222b6644087996fce53944ed8a9.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/9452f10d6b71471799d48ae78e753bb4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/241013121d964faa989f5b337dde0eec.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/9452f10d6b71471799d48ae78e753bb4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/241013121d964faa989f5b337dde0eec.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/9452f10d6b71471799d48ae78e753bb4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/669ff222b6644087996fce53944ed8a9.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/4f7227bbb85e4ccc9aca2f3d89d74d6a.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/4f7227bbb85e4ccc9aca2f3d89d74d6a.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/0f350866a3194483857c706845a5b533.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/16ed085ecd2549528a56518b6ad539cb.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/b0979b4504334f20a0f3fd27e4911c43.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/be73ec72053a443dae4b399043b9fee5.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/d5995bc2336f41e5b2b65470ba66fb01.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/173baa40701e4380b216921008b214f4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672483328/STEM/9452f10d6b71471799d48ae78e753bb4.png)
您最近一年使用:0次
2016-12-04更新
|
79次组卷
|
2卷引用:2015-2016学年辽宁瓦房店市高级中学高二下期末数学(理)试卷
10 . 选修4-1:几何证明选讲
已知
中,
,
是
外接圆劣弧AC上的点(不与点
重合),延长
至
.
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/6b7a244ca80c47ee92e32a706f87fdf1.png)
(1)求证:
的延长线平分
;![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/f2baca9a1359442fb6bc066abae27f34.png)
(2)若
,
中
边上的高为
,求
外接圆的面积.
已知
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/ca4c1810dd4e4d58927bc6fc73a94e45.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/372bc35b1981438da52b2294236cbcc7.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/10d1b8ea6ef94bcbae4a753aad5789a1.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/ca4c1810dd4e4d58927bc6fc73a94e45.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/d08a415981ac412ab895f83bf1c7c843.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/06ce7cc6f2d744ecaeb93d13ee629e95.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/3bb7fe03d2e64c188d1df3bd7142c758.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/6b7a244ca80c47ee92e32a706f87fdf1.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/50df022b812b4a1cb956149438fd504d.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/9b1164b1503546a5ad69550cce42f138.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/f2baca9a1359442fb6bc066abae27f34.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/7e709f11ea6341ab941a60bb53794ee4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/ca4c1810dd4e4d58927bc6fc73a94e45.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/798bd88ac4074985a8c5bcf2f8bc08f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16edecab3862a10bc9480543c34478a9.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573067962802176/1573067969060864/STEM/ca4c1810dd4e4d58927bc6fc73a94e45.png)
您最近一年使用:0次