在
中,角A,B,C所对的边分别为a,b,c,
,D为AB边上的一点,
,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5c45a72849d2cae1d65b282b5bd19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f13a9edb7387d75b75afbe5f241255e.png)
A.4 | B.![]() | C.8 | D.![]() |
更新时间:2020-09-23 19:37:17
|
相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】在高速公路建设中经常遇到开通穿山隧道的工程,如图所示,A,B,C为某山脚两侧共线的三点,在山顶P处测得三点的俯角分别为
,
,
,现需要沿直线AC开通穿山隧道DE,已知
,
,
,则隧道DE的长度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c4668d2a-1a72-4ad1-8799-6fab2c2a300b.png?resizew=237)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d5a9690d02c2b1e6bbd6fd05225c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68abcbf1e98c4a3f7119d922ec629da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a4cd8610ebbc22728db7f30ceb5543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fae5a3ab64625f75180c8cbbd39a87c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea04531fcd729669854a67b62492bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c4668d2a-1a72-4ad1-8799-6fab2c2a300b.png?resizew=237)
A.![]() | B.![]() | C.10 | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知
中,
,其外接圆半径为2,若
,则角
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf321b0a555edaeac372742bd1ca51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知当
时,不等式:
恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdfc172a97562be0002ef3f6d00f43be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
真题
解题方法
【推荐2】若
,则下列结论不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7028ef48d85e8fb9dea4dbc2930d280c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐3】已知
、
,直线
,
,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738439682d8fb6a4715043d18a38d59e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d42669e9b63ec3d43938273453d26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec03fd04b32f5071507e1cfea2da54c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次