在锐角三角形ABC中,
,
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee608882881caff2f1e223177424ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd7a233d545b5eeb082e81488c4667b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
更新时间:2023-09-28 07:32:12
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相似题推荐
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】在
中,已知
,
,
.再从条件①、②、③这三个条件中选择一个作为已知,使得
唯一确定,解答下列问题:
(1)求
的值;
(2)
的角分线
交
于点
,求
的面积;
①
;②
;③
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd44fb80b50c0cbced055f2ff50619b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e02e6946143207c276f7430942c1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637952726dfbcc9f64efc288b2ceb52f.png)
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适中
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【推荐2】已知角
的终边在第三象限,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd07ae12a7d35cc4ac765f319358786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0a9ce5243cc416cbf1f3a7cd7c3d9e.png)
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解答题-问答题
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适中
(0.65)
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【推荐1】已知
.
(1)若
为锐角,求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7a8310d859cd52083da5ac668b7d84.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e20537cedefc9002a00659c512ad089.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2570606fc4d1a286e6217e7a8988754.png)
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适中
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【推荐2】在
中,角
的对边分别为
.
(1)求
;
(2)若
,且
,求
面积的取值范围.
![](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/6d7f040f95cd8071251b752a08ca7991.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484b6bc017a320f56d888ca7bb8952f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0eac00fe896887ff90b20802d6d920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】已知C,D是两个小区的所在地,C,D到一条公路AB的垂直距离分别为
,
,A,B两地之间的距离为
.
(1)如图1所示,某移动公司将在A,B之间找一点M,在M处建造一个信号塔,使得M对C,D的张角与M对C,A的张角相等,试确定点M与点A之间的距离;
(2)如图2所示,某公交公司将在A,B之间找一点N,在N处建造一个公交站台,使得N对C,D两个小区的视角
最大,试确定点N与点A之间的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1042f1eedf35bca829e651fab10c9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed757330ebc13869382834912b8f94f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bd4f1b3a3f3e534c5c3b39266f1ac8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/d48b920e-a699-4001-8e3a-6fc179c7ef0d.png?resizew=366)
(1)如图1所示,某移动公司将在A,B之间找一点M,在M处建造一个信号塔,使得M对C,D的张角与M对C,A的张角相等,试确定点M与点A之间的距离;
(2)如图2所示,某公交公司将在A,B之间找一点N,在N处建造一个公交站台,使得N对C,D两个小区的视角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c378e2e427a45884e28fea4cce3def.png)
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【推荐2】在
中,内角A,B,C所对的边分别为a,b,c,现给出两个条件:
①
;
②
.
要求你从中选出一个条件,并以此为依据解下面问题:
(1)求A的值;
(2)若
,D为BC中点,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a67ee9b2cab5f16ceb31b2fb1b8862c.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16b31dc428f0f425ca5b24b288af201.png)
要求你从中选出一个条件,并以此为依据解下面问题:
(1)求A的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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