设
的内角
所对的边分别为
且
.
(1)求角
的大小;
(2)若
,求
的周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c14fedbe8974faabf3849ae95bcec8.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2021-03-29 10:20:57
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解题方法
【推荐1】在
中,内角
所对的边分别是
,已知
.
(1)求
的值;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e780288f528f430c93396614899d2806.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5499020140392739e11cb15ffe89217e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
【推荐2】在
中,角
的对边分别是
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a4ba4e22ca877c2e66d3ceb761771a.png)
(1)求角B的大小
(2)若
,且
,求边
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a4ba4e22ca877c2e66d3ceb761771a.png)
(1)求角B的大小
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49aec36cc1cf42c48acaa31f3c8fcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc769b0e9723d901ce06f27b5e70cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐1】在△ABC中,BC=2,AB+AC=3,中线AD的长为y,AB的长为x,
(1) 建立y与x的函数关系式,并指出其定义域.
(2) 求y的最小值,并指出x的值.
(1) 建立y与x的函数关系式,并指出其定义域.
(2) 求y的最小值,并指出x的值.
您最近一年使用:0次
解答题-问答题
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(0.85)
解题方法
【推荐2】如图,在平面四边形
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/023c6200-1d47-46b4-b93c-f6bb28d0305c.png?resizew=185)
(1)试用
表示
的长;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2afd22b4c81d8f055b97b3493fffe3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/023c6200-1d47-46b4-b93c-f6bb28d0305c.png?resizew=185)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8790596930426b683ff8d2c132f962.png)
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