选修4-1:几何证明选讲
如图所示,在
中,
是
的角平分线,
的外接圆交线段
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572989770727424/1572989777256448/STEM/a8ce135b35b54e39aee6226b0b097a50.png)
(1)求证:
;
(2)当
时,求
的长.
如图所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d481b73f766666bb189eaed5314f9d2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b2c88f9ce763ec13d7e24080635215.png)
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572989770727424/1572989777256448/STEM/a8ce135b35b54e39aee6226b0b097a50.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572989770727424/1572989777256448/STEM/7d36de2f27444eb9b7660e7d1093904a.png)
(2)当
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572989770727424/1572989777256448/STEM/7f381b227ed64935a08622c31d73e0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
更新时间:2016-12-04 19:18:48
|
【知识点】 几何证明选讲
相似题推荐
解答题-问答题
|
适中
(0.64)
【推荐1】选修4-1:几何证明选讲
如图,点
是圆
直径
的延长线上一点,
是圆
的切线,
为切点,
的平分线
与
相交于点
,与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2016/12/8/1579046393077760/1579046393839616/STEM/c84ed3e0c6d9438bbf925b51ab7c0ea1.png)
(1)求
的度数;
(2)若
,证明:
.
如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/12/8/1579046393077760/1579046393839616/STEM/c84ed3e0c6d9438bbf925b51ab7c0ea1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbb28736e2f6d739a732a2a0a20cabc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12826d3f5dd6c54aaab317faad297c2a.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】A.如图所示,
是园
内两条弦
和
的交点,过
延长线上一点
作圆
的切线
,
为切点,已知
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42453c833ec3a7ce4872fec650cd9d7.png)
![](https://img.xkw.com/dksih/QBM/2017/3/19/1647033146163200/1647946591010816/STEM/56225fe9c4bc4c679860b36e94307e77.png?resizew=183)
B.已知矩阵
,
.求矩阵
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e08ea53af50d2e51b060f21d22d17f4.png)
C.在平面直角坐标系
中,直线
的参数方程为
(
为参数),以坐标原点
为极点,
轴正半轴为极轴的极坐标系中,曲线
的极坐标方程为
,已知直线
与曲线
相交于
两点,求线段
的长.
D.已知
都是正数,且
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff89d2ee12c1cd886422896208f44fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42453c833ec3a7ce4872fec650cd9d7.png)
![](https://img.xkw.com/dksih/QBM/2017/3/19/1647033146163200/1647946591010816/STEM/56225fe9c4bc4c679860b36e94307e77.png?resizew=183)
B.已知矩阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad34e36c307e8ca0a490adfd34566a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05593a9391c462e0e2538844f78e3b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e4cddb450523d6ab69b9080aeb0d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8fa78398b62e6805404f020a0d00e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e08ea53af50d2e51b060f21d22d17f4.png)
C.在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37686fd77607f96d259cfd117c863bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bddf0b3db29426b5f1c396736b7f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
D.已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edfccf9159bb4010669e938f788149b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dcbfa0d3655f4c20db4363f69e6c36.png)
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