已知
的面积为
,且
且
.
(1)求角
的大小;
(2)设
为
的中点,且
,求线段
的长度.
(3)在满足(2)的条件下,若
的平分线交
于
,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ffcd36ac5d27fe261b49b4ee86bfb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c43f7ca25ae65ac6c4b57a42f166af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)在满足(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
更新时间:2024-05-02 21:56:01
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解答题-问答题
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适中
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解题方法
【推荐1】△ABC的内角A,B,C的对边分别为a,b,c,若
,且△ABC外接圆的半径为1.
(Ⅰ)求角C;
(Ⅱ)求△ABC面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3997669c8d2674fe4303c0e2c2f99c6.png)
(Ⅰ)求角C;
(Ⅱ)求△ABC面积的最大值.
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【推荐2】在
中,角A、B、C的对边分别是a、b、c,且
.
(1)求角B的大小;
(2)若
的面积为
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c1df3c171f98aee31270020691e2f4.png)
(1)求角B的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93859d1f7447247abf197a477e51839c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】在
中,角
所对的边分别为
,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096416d2329234385d4139d0945ab846.png)
的面积为
.
(1)求
的值;
(2)求
的值.
![](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/096416d2329234385d4139d0945ab846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a02394ba1a5aa0d3002f0a1469630ab.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24361e4842cdaa3da819c60b55107d7.png)
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【推荐2】记
的内角
的对边分别为
,设
的外接圆半径为
,且
.
(1)求
;
(2)若
,求
的面积.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1946538a3d5dc15556d7bf1065d657b6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0d7fbcc396c7b646c31f60e32d9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图所示,
分别是单位圆与
轴、
轴正半轴的交点,点
在单位圆上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867d00157025729b6a66380810466edc.png)
,C点坐标为(-2,0),平行四边形
的面积为S.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/819354e0-5f35-43e3-a721-919fa1167879.png?resizew=192)
(1)求
·
+S的最大值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285f34134c43ba75b616c6591afa79c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867d00157025729b6a66380810466edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00e55fd3508349b15f987f6b9655b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8501d0d0917907b3b1a3d73516a1d4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/819354e0-5f35-43e3-a721-919fa1167879.png?resizew=192)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4731335d26e45bf7041b36c5f0a1121d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd71aa0604858fc7efc8ec950c961dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c0e9e5b4e20ab4716063af9820786e.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】如图,在四边形
中,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/17f3c885-3211-430f-b5cb-e5787fa1e8f3.png?resizew=219)
(1)求实数
的值;
(2)若
是线段
上的动点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68f1f6c9b5f68889959ab2ce32b8d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241192d8e1664dec0485fa93336d788b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/17f3c885-3211-430f-b5cb-e5787fa1e8f3.png?resizew=219)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bfcb3125cdcb526084e88d71820efe4.png)
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(0.65)
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【推荐1】已知向量
,
,设函数
.
(1)求函数
的最小正周期和其图象的对称中心;
(2)当
时,求函数
的值域..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0091e56311d9daf5c0de1851072a8af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d31f61fdf3323a143390da5e72c4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d2112feaacac4928fa950b94e29421.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42ac72caea5d55e3267085fa6526bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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(0.65)
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解题方法
【推荐2】在等腰梯形
中,已知
,
,
,
,动点
和
分别在线段
和
上(含端点),且
,
且(
、
为常数),设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/2aefe05a-5bb5-4bf7-a804-4a2b4f1a4b6d.png?resizew=185)
(Ⅰ)试用
、
表示
和
;
(Ⅱ)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1f22c0a4f0c7ce17e9bfcf32c8b60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706f003f4f69af8a427e24ea94e98108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae60c09521904ab969829bf0d74edd37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/2aefe05a-5bb5-4bf7-a804-4a2b4f1a4b6d.png?resizew=185)
(Ⅰ)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd0cecf5c102254b9755e42a80c3948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8a2a41a8b50e10d68943e3f0f4e05.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f371d431b6c91972b742c426c8a81ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7173b357dec0dca7d6da123345089741.png)
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