1 . 选修4-1:几何证明选讲.
如图,在
中,
是
的角平分线,
的外接圆交
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/0794bda203b944349d49efad284b90f6.png)
(Ⅰ)求证:
;
(Ⅱ)当
时,求
的长.
如图,在
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/f985da69e203446bac2db2bae9103d24.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/3679c3ffff3f407ebbf7421681ce9ddd.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/050e77dbd70c46dfb2e45d4ffbd899c7.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/17bacc3ffab8425d9dc4eabca7bc7ef9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/baa5fcd72fac467fbd321f3032a5214c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/1cd0ffa89dfc4920a2626d9ec294a2de.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/abbe4d5299254703affa13ee0e4fe5fc.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/0794bda203b944349d49efad284b90f6.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/ccf630fe2326440b9955984b0d0e39c8.png)
(Ⅱ)当
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/c20af89a87ab47dcb26ebcda13f28638.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478873812992/1572478880178176/STEM/1c5f516ab37146f1b81099a60b7ccee6.png)
您最近一年使用:0次
2016-12-04更新
|
197次组卷
|
2卷引用:2016届广西武鸣县高级中学高三9月考理科数学试卷
2 . 选修4-1:几何证明选讲
如下图,
于点
,以
为直径的圆
与
交于点
.
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/15511e9c79b749bfb0abb99dcb781c61.png)
(1)求证:
;
(2)若
,点
在线段
上移动,
,
与圆
相交于点
,求
的最大值.
如下图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e496a2e3609bbc24eb90c83b35b8ad9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/15511e9c79b749bfb0abb99dcb781c61.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/c2be881d320b4c73a0eadbbb76ebe8de.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/7767686b491748038198638e9ef5b00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/058c1a0205b04672b42795f2454c381f.png)
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/24a9b3e480384978b4de6e2b06256a80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/17/1573155798556672/1573155804323840/STEM/04a32cc30f734c968ab82b13f4ea2bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
您最近一年使用:0次
3 . 选修4-1:几何证明选讲
如图,
是
的直径,
是
的切线,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573095472734208/1573095478673408/STEM/478a4dd01e694ac08aee8b9b22a56c3d.png)
(1)过
作
的切线,交
与点
,证明:
是
的中点;
(2)若
,求
的大小.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573095472734208/1573095478673408/STEM/478a4dd01e694ac08aee8b9b22a56c3d.png)
(1)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d703388e908f0cc99b37c176c7181fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
您最近一年使用:0次
2016-12-04更新
|
72次组卷
|
4卷引用:2017届广西南宁二中等校高三8月联考数学(理)试卷1