第11章解三角形之正弦定理
一、单选题(共5小题)
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A.![]() | B.![]() | C.![]() | D.2 |
【知识点】 正弦定理解三角形解读 三角形面积公式及其应用解读
![](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 |
【知识点】 三角形面积公式及其应用解读 余弦定理解三角形解读
二、填空题(共5小题)
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【知识点】 正弦定理边角互化的应用解读 余弦定理解三角形解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
【知识点】 正弦定理边角互化的应用解读 三角形面积公式及其应用解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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三、解答题(共5小题)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求角A的大小;
(2)求△ABC周长的取值范围.
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
(2)若
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(1)求函数f(x)的单调性;
(2)在△ABC中,角A,B,C的对边分别为a,b,c,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d365cdf0e3096f91df62d126a0f3aa1e.png)
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