解题方法
1 . 根据所给条件,判断
的形状:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e02e6946143207c276f7430942c1b7.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a641da1c70d0ad481082af87e98ccbf.png)
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解题方法
2 . 在
中,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c53b74284923e061b2d81b233acc39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a9c8e0dd98b67388a4cec50efbf4a3.png)
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2021-03-23更新
|
753次组卷
|
2卷引用:沪教版(2020) 必修第二册 高效课堂 第六章 三角 6.3 解三角形(2)
3 . 在锐角
中,已知
,求角C及边c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b89452976ed9431c3691395f33f15c.png)
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4 . 在
中,
分别是角
的对边,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0496afe407008f00098d5360c3cad538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a60830802e2690afaa23a1ed0a684eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535f5caa16137db9bb7c7c97dd9a3ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
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5 . 已知
中,
,D在
上,
,点E在
边上,且
恰好将
的面积平分,求点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d200e7cb458ea9ecad0ee658fb930bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad072c96836c6d9a4bcb61993203fd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
6 . 已知
的面积为
,且
,当
时,求
与
的夹角的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2e3b2eb83eb2fe1119e78f4e6e8eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2533b6e4f1b37931931de7a887ac9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5efb8adb11535d90d8f7af66da4ac2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08493c1e001d85731cb4863ec38857fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa76fdc9b9ce34c8eb6b102b2dc4578b.png)
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解题方法
7 . 已知a、b、c分别是
的三个内角A、B、C的对边.
(1)若
面积为
,求a,b的值;
(2)若
,试判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10e7360af8c5cb7e66bbd286eaf16ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e02e6946143207c276f7430942c1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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8 . 已知函数
.
(1)当
时,求
的值域;
(2)已知
的内角A、B、C的对边分别为a、b、c,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59cb0ecb5ebd82ec79f5768fceaa2f9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce485410257c9c1fae9d87ce3e44cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f344c2a51070ba88ad195b5375ced78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
9 . 在
中,
.
(1)求
的面积;
(2)若
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ea4e0df1243598ce667100ded68178.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7407d82d6e55b969d34e937ce36f3d.png)
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10 . 航空测量组的飞机航线和山顶在同一铅直平面内,已知飞机的高度为海拔
,速度为
千米/小时,飞机先看到山顶的俯角为
,经过
后又看到山顶的俯角为
,求山顶的海拔高度h.(精确到m)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63d232f4c2f011a7bf8775e35a0d907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f7530034abc91d11bc847602eaf5bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c9c8502ba7688ac060f72561e4c782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/7e8370f4-e8b6-402d-97fc-3c2aedcebf49.png?resizew=356)
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