已知向量
.
(1)求
的取值范围;
(2)记
,在
中,角
的对边分别为
且满足
,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a0fc1d8e8a902ff9f001b77500e26e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bebc84392a99f5a68de2da36c0e418.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbadb801b4df353885a517d465a3929.png)
![](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/a393b5433b7bba69dea4a648692af7e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e3d87be9f706832ef25537d78a201b.png)
更新时间:2024-05-19 22:01:02
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相似题推荐
解答题-问答题
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适中
(0.65)
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解题方法
【推荐1】在
中,内角
所对的边分别为
,向量
,且
.
(1)求角
的大小;
(2)若
,求
面积的最大值;
(3)求
的值域
![](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/4aa3de73f2b4dde4be1fbd024c2270fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cb5138a03b19266f82223899a614f7.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ab05b79a8aba3fef6d353103ab09c8.png)
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【推荐2】
的内角
所对的边分别为
,
的面积为
,从条件①
;条件②
;条件③
中选择一个作为已知,并解答下列问题.
(1)求角
的大小;
(2)点
是
外一点,
,若
,求四边形
面积的最大值.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d9b5149da4fa3a2037cb3ca641d4dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58a6d9144327818740036870927ab40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341d455284c0850829e1d0e0b5147761.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51ab8285859ea9fd367dea2cc53a470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐1】在
中,角A,B,C对应的边分别为a,b,c.若向量
,且
.
(Ⅰ)求角C;
(Ⅱ)若
且
,求c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218c81f20efc0338a0299e8938406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45632b3ca6ab6c0b05df0d5a838c375.png)
(Ⅰ)求角C;
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8575e159c381dc45422a17a7a7eaa9.png)
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【推荐2】已知向量
,函数
.
(1)若
,求
的值;
(2)已知
的三个角
的对边分别为
的面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730594cb2aff1b9a3f0b7144cfe1c3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbadb801b4df353885a517d465a3929.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c7a0bddd47bb3203cd42d4eb5af0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)已知
![](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/eabb3bea35f5af85077f047e42a62ac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eccdbaacf8be05bdf40a9338d25d9cc.png)
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适中
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解题方法
【推荐1】已知
.
(1)化简
,并求
;
(2)若
,求
的值;
(3)求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc9f4c07c813dd80066d4e126af016d.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1ba6b6ee00c4b2763cb3fa59caa69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecd5f251e8a94a611cc98d239ff9575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64800a178eba0e2ebd60efb085b9484.png)
(3)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac60b288ff98119f3125854fb6137f73.png)
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【推荐2】设函数
.
(1)求
的最小正周期;
(2)若函数
与
的图像关于直线
对称,求当
时,
的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa972a8837ab1d7ff7d960a75e268d2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e8ebd7c4463e7311f7ab4d7cd7d241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d451353cb7bb3621735818df9debb69a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f86b10d6922037a31f033fb88106e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
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【推荐1】已知
,
,
,其中
,若
的最小正周期为
.
(1)求函数
的单调递减区间;
(2)锐角
中,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be7f395fe4a358d1c6fca7f5eda84ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a85ef1db2cfd56955a8c70897a481c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4189bb81a139b117b20a688a60c768f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d37b2f8d5da8eaa07442b941017c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e3d87be9f706832ef25537d78a201b.png)
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【推荐2】如图所示,扇形
,圆心角
的大小等于
,半径为
,在半径OA上有一动点C,过点C作平行于OB的直线交弧AB于点P.
(1)若C是半径OA的中点,求线段PC的大小;
(2)设
,求
面积的最大值及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(1)若C是半径OA的中点,求线段PC的大小;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b710be34d39a3058bad08e397849e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/847f3efe1ed0442eeaef93c89439c581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/14db277f-75c4-43c4-ae32-c768bc4ff061.png?resizew=144)
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