在
中,已知
,
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a74c3e9a8f3f11e98b4fa659a97679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0f8cec0bda89b6c2ad7ab3cd6c219c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.4 | B.![]() | C.2 | D.1 |
23-24高一下·福建三明·期中 查看更多[2]
更新时间:2024-06-07 21:44:14
|
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单选题
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较易
(0.85)
解题方法
【推荐1】在
中有,角
,
,
所对应的边分别为
,
,
,
,
,则角
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e1bd4f72b3edd9647378d1191857fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c23fcc52d64c9ca8e9f2b753cc6750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
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解题方法
【推荐2】已知
的面积
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cadaa7fe4fedd5d85038dd6b6c43699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339aef88f1020dd97e3673c8b279048d.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】△ABC的三个内角A、B、C的对边分别是a、b、c,若△ABC的面积是
,
,a=2c,则b=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1dd07c0571772e96d318f974724810.png)
A.2 | B.4 | C.6 | D.8 |
您最近一年使用:0次
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【推荐2】三角形两边之差为2,且这两边的夹角的余弦值为
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A.钝角三角形; | B.锐角三角形; | C.直角三角形; | D.不能确定. |
您最近一年使用:0次
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【推荐1】在
中,角A,B,C的对边分别是
,点
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,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4322401f5fc0621086ee1103cd88581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36934e1a30812c32c7b1704ef7f92cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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较易
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【推荐2】已知
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,则
最大的内角为( )
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次