2011高一上·山东泰安·学业考试
名校
解题方法
1 . 已知△ABC中,acosB=bcosA,则△ABC为
A.等腰三角形 | B.直角三角形 |
C.等腰或直角三角形 | D.钝角三角形 |
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2011高一·安徽蚌埠·学业考试
2 . 如在四边形
中,已知
,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2011/5/20/1570213716729856/1570213721563136/STEM/0853bf16-476a-448c-81a6-79ea528f2f58.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff116014f9d7e7628f44e79320f2bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d14521bd48ccc5f7726ae637dd2decb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2011/5/20/1570213716729856/1570213721563136/STEM/0853bf16-476a-448c-81a6-79ea528f2f58.png?resizew=143)
A.![]() | B.![]() | C.![]() | D.![]() |
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11-12高二上·山东济宁·期末
解题方法
3 . 在锐角
中,内角
对边的边长分别是
,且
,
(Ⅰ)求角
;
(Ⅱ)若边
,
的面积等于
, 求边长
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0ae8e92dd3119d41f2c830ea526516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991044f84009873ee1de3b012f98551b.png)
(Ⅰ)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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