解题方法
1 . 已知
中,
、
、
分别为角
、
、
的对边,且
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4657864689810122acf83ebf9228aa.png)
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e876b53581904085bbc4e00fad0c718f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4657864689810122acf83ebf9228aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e76fa4cb9866b74ea30caa52ad94f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10-11高一下·吉林长春·期中
名校
2 . 若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb96d91115afd029e490af8e1aa8a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d75442a901f013aeb5c52a7113ae9b9.png)
A.![]() | B.![]() | C.4 | D.12 |
您最近一年使用:0次
解题方法
3 . (1)化简
,
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152963aac7c4c434208c1c64d50d5096.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be56b1a496ea4838aef49d6147b65e18.png)
您最近一年使用:0次
解题方法
4 . 若
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
_____ .
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939971715072/1572939977646080/STEM/ebe2e7e7dc694cf8a8b0573967728edf.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
您最近一年使用:0次
名校
5 . tan20o+tan40o+
tan20otan40o 的值是__________ .
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572910841511936/1572910847516672/STEM/8b3fe7c7044f4e3cb78cde11abf81646.png?resizew=24)
您最近一年使用:0次
2016-12-04更新
|
715次组卷
|
2卷引用:安徽省亳州市第二完全中学2022-2023学年高一下学期期中教学质量检测数学试题
名校
解题方法
6 . 计算
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133e97d8f65b9774ce1168e427f938eb.png)
您最近一年使用:0次
2016-12-04更新
|
453次组卷
|
2卷引用:2015-2016学年河北省邢台二中高一下期中数学试卷
10-11高一下·浙江嘉兴·期中
7 . 在
中,
,则
等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011703fdd9128e742365374a4db1fec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2016-12-02更新
|
2710次组卷
|
7卷引用:2010-2011年浙江省嘉兴一中高一下学期期中考试数学试卷
(已下线)2010-2011年浙江省嘉兴一中高一下学期期中考试数学试卷2015-2016学年福建省晋江市季延中学高一下期中数学试卷(已下线)2013-2014学年安徽淮南五中高一上学期期末检测数学试卷2019年河南省郑州市高一下学期期末考试数学试题人教A版(2019) 必修第二册 过关斩将 第六章 6.4 综合拔高练安徽省阜阳市2020-2021学年高一上学期期末数学试题沪教版(2020) 必修第二册 单元训练 第6章 正弦定理和余弦定理(A卷)
11-12高一下·浙江宁波·期中
8 . 在
中,
分别是
所对的边,
,
,三角形的面积为
,
(1)求
的大小;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1f7810a93537622e939ac4842744a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036b23c94e305faaa1283996edc5b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
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12-13高一上·黑龙江大庆·期末
解题方法
9 . (1)将形如
的符号称二阶行列式,现规定
=
,试计算二阶行列式
的值;
(2)已知
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db39c6e70da8a9eb3829d1e0abeb327c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db39c6e70da8a9eb3829d1e0abeb327c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595086d3ead9effb1f3e35465ded2df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d26c180c8965bf7862dbb012d043cc.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445d60a8628049030c60cac3e3f08a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac46de801882c506fa8f73354f6b4ca.png)
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12-13高三上·浙江金华·期末
名校
解题方法
10 . 已知
,则
=_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f194b6616185364b538c25a2772c4fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
您最近一年使用:0次