解题方法
1 . 已知
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da951e45061c4a21b216e04fca76a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87bad4c3f9aba47bccdbcc961542c0b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49e1ed3cf21e56d0b5251a108e158f3.png)
您最近一年使用:0次
2 . 已知
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc6b35959e9788ae119e9d690108d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e954269bf33ed28374d84d4719c65ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f512cfdddc359447dd1d8adb18d0ab4.png)
您最近一年使用:0次
解题方法
3 . 在
中,已知
,
,求
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfeaf26f178031f78a5545233a2a73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a95f9136fe8f648f21b332447a49d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f3a180c35808d1fe14ae17876c4cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e5dc31ddd298ec8ee56d934ca18e1b.png)
您最近一年使用:0次
2023-10-09更新
|
65次组卷
|
3卷引用:北师大版(2019)必修第二册课本习题第四章3.1二倍角公式
4 . 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)
您最近一年使用:0次
解题方法
5 . 如图,有三个相同的正方形相接,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e762669f4c3db04e1863a653ad0f6f67.png)
您最近一年使用:0次
6 . 若
与
互余,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d038d47c0af22695ab0d7c9c37e61b9c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8dd0c52aca1675c17b9a019aa7901e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad23bcc6b917fb9c1c3c9fde2ecc9bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d038d47c0af22695ab0d7c9c37e61b9c.png)
您最近一年使用:0次
2023-06-30更新
|
220次组卷
|
3卷引用:江西省赣州市立德虔州高级中学2022-2023学年高一下学期第二次月考数学试题
21-22高一·湖南·课后作业
解题方法
7 . 设
为第二象限角,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7eaca72713e31545867306c4affc773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7b915277169254e670ea51b693b9fc.png)
您最近一年使用:0次
20-21高一·全国·课后作业
8 . 利用和(差)角公式,求下列各式的值:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5dc2a631c3e0eede00a950f0383b6c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b35a2b4bdc6e92cc749a04d3a3b9231.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee7211849ed165890b43318b3a08831.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391a69bfa3adbc9260e808891a75763.png)
您最近一年使用:0次
2021-11-21更新
|
1490次组卷
|
3卷引用:5.5 三角恒等变换
20-21高一·全国·课后作业
9 . 在
中,已知
,求角C的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25828ec558bd26a9742236ead80bace.png)
您最近一年使用:0次
20-21高一·全国·课后作业
10 . 已知
,
是第二象限角,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9330f5a1902fe99fc5edd744fbe9146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbaab4e4dd53189ad8e971d8470ba985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f35152720e43c6403d43bef47c0377d.png)
您最近一年使用:0次