在△ABC中,内角A,B,C的对边分别为a,b,c,且a+b=
c,2sin2C=3sinAsin B.
(1)求角C的大小;
(2)若S△ABC=
,求c的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求角C的大小;
(2)若S△ABC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
更新时间:2021-09-04 20:58:23
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适中
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【推荐1】已知
的内角
的对边分别为
,若
,
.
(Ⅰ)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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(Ⅰ)求
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(Ⅱ)当
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解题方法
【推荐2】在△
中,角A,B,C所对的边分别为a,b,c,且
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(1)求角A的大小;
(2)若D为
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(1)求角A的大小;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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适中
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【推荐1】在
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,
,
的对边分别为
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,
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,
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(1)求角
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【推荐2】记
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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(0.65)
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【推荐1】在
中,已知
,
,
,
为
边上的中点,
的面积为
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(1)求
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(2)点
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【推荐2】已知平面四边形
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