在
中,角
所对的边分别为
.
(1)若
,求
的值;
(2)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4444f46af4a32e3010429f9451487abc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0acbb8cf58bb2a71a919dcf4adeb74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b616995fb89e92f18df875d4657d404e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
2024·河北石家庄·三模 查看更多[2]
更新时间:2024-05-20 09:41:36
|
相似题推荐
【推荐1】现在给出三个条件:①a=2;②B
;③c
b.试从中选出两个条件,补充在下面的问题中,问题:在△ABC中,a、b、c分别是角A、B、C的对边,且满足
,_______,_______.求△ABC的面积(选出一种可行的方案解答,若选出多个方案分别解答,则按第一个解答记分)
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【推荐2】在① ac=4
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问题:是否存在△ABC,它的内角A,B,C的对边分别为a,b,c,且b=2c,A=
,___________?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
问题:是否存在△ABC,它的内角A,B,C的对边分别为a,b,c,且b=2c,A=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
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【推荐3】在
中,角A,B,C所对的边分别为a,b,c,设向量
.
(1)求函数
的最小值;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a30b245bc1e1154050d44c3ec990d8.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3292a7444b7e76515cee05ffe1eea50.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a0b10a58ed2fc02c220b7e156351e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】在
中,
.
(1)求
;
(2)若
的面积为
,再从条件①、条件②、条件③这三个条件中选择一个作为已知,使
存在且唯一确定,求a的值.
条件①:
;条件②:
;条件③:
.
注:如果选择的条件不符合要求,第(2)问得0分;如果选择多个符合要求的条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebdfb7e3b5d84846589c83f1ada889b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986fbc5e1110e50442e08a40ca4b2422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e48fc9e931ce9435cee6f754d0c2ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b4b40e0f916b551e879c45558a0bcb.png)
注:如果选择的条件不符合要求,第(2)问得0分;如果选择多个符合要求的条件分别解答,按第一个解答计分.
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【推荐2】已知
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所对的边分别为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55493e331f88d3d1c396e92b46c97ecd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2eb41913d12742fa72f7d29da3c295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
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(1)求
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(2)求
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【推荐2】在△ABC中,内角A,B,C所对的边分别为a,b,c,且
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(1)求B的大小;
(2)若
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(1)求B的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c36a1287b4547910d595a9532412946.png)
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【推荐1】已知
分别是锐角
三个内角
的对边,且
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(Ⅱ)求
面积的最大值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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(Ⅰ) 求
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(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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【推荐2】已知函数
.
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(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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