如图,
切
于
,若
,
,
,
,则
等于
![](https://img.xkw.com/dksih/QBM/2017/1/25/1619472216219648/1619472216530944/STEM/98b7383142fd4af8bcf9b9cfaf56f6ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1ec05e3cec27677ded7b4aecaa62d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c56803859bab5c8f42c7e3b8279112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2017/1/25/1619472216219648/1619472216530944/STEM/98b7383142fd4af8bcf9b9cfaf56f6ae.png)
A.3 | B.4 |
C.6 | D.8 |
更新时间:2017-02-08 11:27:34
|
【知识点】 几何证明选讲
相似题推荐
单选题
|
较易
(0.85)
【推荐1】如图,A、B是⊙O上的两点,AC是⊙O的切线,∠B=70°,则∠BAC等于
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572117314371584/1572117319999488/STEM/16959c7fa48b459bb8725d0ce9b4af82.png)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572117314371584/1572117319999488/STEM/16959c7fa48b459bb8725d0ce9b4af82.png)
A.70° | B.20° | C.35° | D.10° |
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单选题
|
较易
(0.85)
【推荐2】如图,
是半圆
的直径,点
在半圆上,
于点
,且
,设
,则
=
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/03e3d6328b1e487da128159725b54332.png)
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/8be9c76e39ac4191a5ac12207591942f.png)
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/7b5bcfe4233048599314efc68e800143.png)
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/399d39e241554abcb36f3e1b83ee1017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971cd0358b49f1661adc674801bd6ecb.png)
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/76860b20b46948f3b19fee3ab7593a01.png)
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/be253aabab5149a7982631cecb2dc338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0784827daa1e4dbadb6c3c0c7e6c73c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b33a8e9a0071cef5414525c6fe45ef.png)
![](https://img.xkw.com/dksih/QBM/2011/7/16/1570262382518272/1570262387662848/STEM/03e3d6328b1e487da128159725b54332.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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