已知在
中,内角
的对边分别为
,若
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35cf69121b491f422fb5b76df80d1678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c8fe4dd97412f093a5d29382b07622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-10-15 22:57:50
|
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单选题
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适中
(0.65)
名校
【推荐1】已知函数
,若函数
与
的图象关于点
对称,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5baf171b517d8d75aac4e4dda30515a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e738bce4fa92616b5be79e7c605d8547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
【推荐2】在非等边斜三角形
中,
为
的外接圆半径,
为
的面积,下列式子中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
单选题
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(0.65)
名校
【推荐1】在
中,
分别为内角
的对边,若
,
,则
的面积的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be4380bdcef1c542604a6ad61642c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febfce52f76b851da3c3dda7ef205a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.![]() | B.2 | C.![]() | D.4 |
您最近一年使用:0次
单选题
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适中
(0.65)
名校
【推荐2】在
中,若
,三角形的面积
,则三角形外接圆的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104fc02e0fda3f8ce9e075a03cfb1044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2dd89c37b60b4596ac30e339aa0000.png)
A.![]() | B.2 | C.![]() | D.-2 |
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单选题
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适中
(0.65)
【推荐1】已知圆
,圆
是以圆
上任意一点为圆心,1为半径的圆.圆
与圆
交于
,
两点,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8af321460f93ba9f969e4a7a4600b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d08f0ab6e573253450e03427e13db1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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(0.65)
解题方法
【推荐2】2021年7月份河南郑州地区发生水灾,灾后需要对市区所有街道进行消毒处理.下面是消毒装备的示意图,MN为路面,PQ为消毒设备的高,OQ为喷杆,
,
,O处是喷洒消毒水的喷头,且喷头的喷射角
,已知
,
,则消毒水喷洒在路面上的宽度AB的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/4e20070b-fe8b-4bb0-8105-055ea21d196a.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7555f635da615b09b7e2f08ddbeaf1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985c343e4fa5c66918342f00fb2f45ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d162c29b1e484cfc87350dd68f00b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d14c6959273338a048b023805cce80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54376f80b31b2cf3373753c51b655ef2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/4e20070b-fe8b-4bb0-8105-055ea21d196a.png?resizew=178)
A.![]() | B.![]() | C.![]() | D.![]() |
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