名校
1 . 已知,如图,
是圆
的直径,点
为圆
上一点,
于点
,交圆
于点
,
与
交于点
,点
为
的延长线上一点,且
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573000916713472/1573000922562560/STEM/8a9afd1397b845d5b8d70b1c1016d2db.png)
(1)求证:
是圆
的切线;
(2)求证:
;
(3)若圆
的半径为5,
,求
的长.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1074256fbf5ca9592f8be962fb401d4f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9909a7084fde8170536cdece59e987ad.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573000916713472/1573000922562560/STEM/8a9afd1397b845d5b8d70b1c1016d2db.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67471791dc53ef3f0dc4431643868bb.png)
(3)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee608882881caff2f1e223177424ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
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10-11高三·浙江杭州·假期作业
2 . 在直角坐标系
中,点
到两点
、
的距离之和等于4,设点
的轨迹为曲线
,直线
与曲线
交于
、
两点.
(1)求出
的方程;
(2)若
=1,求
的面积
(3)若OA⊥OB,求实数
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1439ae355f4f6830dc3456381e5ef654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23f82955c5317803eb2f7fb59c19a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998e9908f0ffed5c312c6484955dd1c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
(3)若OA⊥OB,求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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10-11高一下·浙江杭州·期中
3 . 如图,已知PA切
于A,
于B,如果PA=10,AB=6,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed45e4d4c844946148c3f12c19fe4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74d4d587b12f0c7714838330b2b84ad.png)
![](https://img.xkw.com/dksih/QBM/2011/4/27/1570132563206144/1570132568489984/STEM/f9e330d4ff6c445bab97d2f3bed14cc6.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2011/4/27/1570132563206144/1570132568489984/STEM/0b81562b54334400aaf50ddf6928d594.png?resizew=238)
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10-11高一下·浙江杭州·期中
4 . 如图AP=3厘米,BP=5厘米,CP=2.5厘米,则CD=_________ 厘米
![](https://img.xkw.com/dksih/QBM/2011/4/27/1570132563206144/1570132568424448/STEM/9d127ef7ce934056aa2340b7149f497c.png?resizew=143)
您最近一年使用:0次