在△ABC中,
、
、
分别是角A、B、C的对边,
.
(1)求B;
(2)若
,△ABC的面积为
,求△ABC的周长.
![](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/354c8d92268e54afa2580cca6e634c25.png)
(1)求B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0493dbdedc23da5f6d3c29d5158ecf.png)
更新时间:2022-11-10 12:34:13
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解答题-问答题
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适中
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【推荐1】在
中,a、b、c分别是三个内角A、B、C的对边,若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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求:(1)边b的长;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】记
的内角
,
,
的对边分别为
,
,
,已知
,
.
(1)求
;
(2)若
,求
的面积.
![](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/3578b63c5903089595bf324c809a997c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dded8b69ef3d9cd3dcddbc78a5fe6857.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0136c37c35c4db6f66be20a4b3a5c8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】在①
,②
,③
这三个条件中任选一个,补充在下面问题中,并解答该问题.
问题:已知
的内角A,B,C所对的边分别为a,b,c,若_________,且
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注:如果选择多个条件分别解答,按第一个解答计分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78bf7652a4cac3c91ff07bb3df37520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83b2c305de8da723aa7957d774c0821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8297a150b2d5a513b5cce857c8bc6fc9.png)
问题:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87dca1950e6d819c552fcd3ce305ed35.png)
注:如果选择多个条件分别解答,按第一个解答计分
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【推荐2】设
的内角
所对应的边长分别是
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.
(Ⅰ)当
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(Ⅱ)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e8b8e3352563854e43cedc0a5bf2b0.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b86d43790babcdbbdc03493ee70928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
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【推荐3】如图,在中,
,
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,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9023a0297f4d7a5eb085df96be4b3de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d463b66eacd0205c0f1301dbb8d9aa91.png)
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【推荐1】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545c791d629dad8bd31dc09fe700f86b.png)
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