在
中,D为边AC上一点,
,
.
(1)若
,求
的面积;
(2)若
,
,
,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af633abfe3cb03f1836db6c570a5bcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251023095e4ed1b906ce1ea86ac14c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133760237c0ccf2d6a83786925b6d23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9424314de58ae590641aa36c32336e.png)
更新时间:2023-11-15 18:40:14
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适中
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解题方法
【推荐1】
中,内角
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(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a6e830847e0c9b22356665afedc82c.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95faa14eb62523f9c1c28ef389c6a2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b2925cdf8dfc9bb3d5763d421d9c8e.png)
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【推荐2】从①
;②
;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abbf65c6f301f7b5f89de9d2a5f291f.png)
,这三个条件中任选一个,补充在下列问题中,然后解答补充完整的题目.注:如果选择多个条件分别解答,按第一个解答计分.已知△ABC的三个内角A,B,C的对边分别为a,b,c,且 .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0ccc9d46043c0409b5947508a98130.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db65f0cfbb355e658cb61c094d0ace3c.png)
(1)求角B的大小;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
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(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9640df67b356f36c4316e39ca001b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
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适中
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【推荐2】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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适中
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【推荐1】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c926498dd79f6817e8dd56ed2a1cf57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b59cd7894a0f128a0d3a94be762fcd4.png)
(1)求
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97829a918d99c3545530c54358e12607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e2c99a2f905086b8df41c280a5fc84.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0d5cf8c22d0cf93274939d92963665.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次