在
中,角
的对边分别为
,且
.
(1)求角
的大小;
(2)若
的面积
,求
的周长.
![](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/d6a3ea9fb31d1aacecec6926e13dc3fc.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb73a2dc40069c748730f6bac9031e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
23-24高二下·福建福州·期中 查看更多[4]
福建省福州第三中学2023-2024学年高二下学期期中考试数学试卷江西省南昌市第十九中学2023-2024学年高一下学期5月期中考试数学试题(已下线)专题02 第六章 解三角形及其应用-期末考点大串讲(人教A版2019必修第二册)黑龙江省哈尔滨市第九中学校2023-2024学年高一下学期6月月考数学试题
更新时间:2024-05-04 20:16:13
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适中
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【推荐1】在锐角三角形
中,角
,
的对边分别是
,
,
,若已知
,且
.
(1)求角
的值;
(2)求三角形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5156a9d41bd9b5f3767a453ad1b27ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fb725a3e20ac72b317fd433dd3b1ab.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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【推荐2】在
中,角
的对边分别为
,且
.
(1)求角
的大小;
(2)若
为锐角三角形,且
,求
周长的取值范围.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5386f3efe25797dea346c824a0b647a2.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】已知
的内角
的对边分别为
,且
.
(1)求
;
(2)设
为
的中点,
,求
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/1f1dac2bcadf075dc622d4d1312f80c5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
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【推荐2】记△ABC的内角A,B,C的对边分别为a,b,c,已知
.
(1)证明:
;
(2)若△ABC的面积为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42bfbfe4b84bbb99307835dab5e51970.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec3565449fe1baaec60313521173454.png)
(2)若△ABC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c288e5bf4c875ceb8544b0d582e318cb.png)
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【推荐1】△ABC的内角A,B,C的对边分别为a,b,c,已知a=1,B
,△ABC的面积为
.
(1)求△ABC的周长;
(2)求cos(B﹣C)的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06208e44ee3ae77bd78df612a39c1c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca820a456491348e72587e4fe10bc6.png)
(1)求△ABC的周长;
(2)求cos(B﹣C)的值.
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【推荐2】已知
的内角
,
,
的对边分别是
,
,
,且
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.
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的值;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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(1)求
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(2)若
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【推荐1】现代传媒大厦是我市最高的标志性建筑.某学习小组要完成两个实习作业:验证百度地图测距的正确性及测算传媒大厦的高度.如图(1).龙城大道沿线的水平路面上有两点A.B其中
指向正西方向,首先利用百度地图测距功能测出AB长度为2km,接着在飞龙路沿线选定水平路面上可直接测距的C.D两点,测得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe7c1eaa28e04a3cae0d4d5865efc1b.png)
,学习小组根据上述条件计算出CD长度,并将其与CD的实际长度2.84km进行比较,若误差介于-20米~20米之间,则认为百度地图测距是正确的.
)
(2)如图(2),小组在A处测得现代传媒大厦楼顶M在西偏北
方向上,且仰角
,在B处测得楼顶M在西偏北
方向上,通过计算得
,
,
若百度地图测出的AB=2km是准确的,请根据以上数据测算出传媒大厦的高度(精确到1米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
(2)如图(2),小组在A处测得现代传媒大厦楼顶M在西偏北
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767f7522422d3cedea11585bd45d4780.png)
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【推荐2】已知
的内角
的对边分别为
.
(1)求
的值;
(2)若
的面积为
,且
,求
的周长.
![](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/8f34c83e016325d0522dc5a5fa58de8a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0181723c3b13b5ab2f33d9cdcdd8993e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee6dc5bc74c3fe6e2f1c224d936928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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