已知
的内角
的对边分别为
,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e91b90095bc0c6071520204c4d7bc5.png)
(Ⅰ)求
的值;
(Ⅱ)若
的面积为
,且
求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2333da32638ec636fa1e69e750ca4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8345b7700599f7a3ae282772fc01c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76bd63e412db4f9942f6bce7f908096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e91b90095bc0c6071520204c4d7bc5.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90518d29cb2fd47f855cfa848cf62daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
更新时间:2016-12-04 16:07:49
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】在
中,角
所对的边分别为
,且满足
,
.
![](https://img.xkw.com/dksih/QBM/2018/10/10/2050487788232704/2052588916899840/STEM/537797c73e5e40aebd6fd3f8d3c6bdbc.png?resizew=168)
(1)求
的面积;
(2)若
、
的值.
![](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/99d5573c94dbb26cff4e2b59720f5e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985ea6843f52e2edff7d4ef61d822a4b.png)
![](https://img.xkw.com/dksih/QBM/2018/10/10/2050487788232704/2052588916899840/STEM/537797c73e5e40aebd6fd3f8d3c6bdbc.png?resizew=168)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9bd19d7cd0291755e723309fa55bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】记
的内角A,B,C的对边分别为a,b,c,已知
.
(1)求角
的大小;
(2)若
点在线段BC上,且AD平分
,若
,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5b8ff06f0bc798144f4dab6ab127ce.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d78524f98b01fa1dadfd277939665b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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.若问题中的三角形存在,求该三角形面积的值;若问题中的三角形不存在,说明理由.
问题:是否存在
,它的内角
的对边分别为
,且
,
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17138ca8bbe22c46e00d62b4f753bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2c43f27384fd8b270fa834ff95f29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73f40bd204787214cb61f1433770471.png)
问题:是否存在
![](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/9ea6f19d43b6ab8ce4b653a61f7566d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
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解答题-问答题
|
适中
(0.64)
【推荐2】
的三个内角
的对边分别为
,
成等差数列,且
.
(1)求
的值;
(2)若
也成等差数列,试判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd51c782333e04862704165622ad68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd51c782333e04862704165622ad68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f40b06e72c625bd5896f330055fc64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f384e98d574fa2676d61624285f88188.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b509c031b3f36619849de4f4651fcc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
您最近一年使用:0次