已知![](https://img.xkw.com/dksih/QBM/2016/8/4/1572956059320320/1572956065406976/STEM/7d74168198ac410cbba3ba3b3a1f859c.png)
(1)化简
.
(2)若
是第三象限角, 且
,求
的值.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572956059320320/1572956065406976/STEM/7d74168198ac410cbba3ba3b3a1f859c.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa62ede81ff7d43759148a1a8c212607.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572956059320320/1572956065406976/STEM/8899f13d115142fc9946458bd04dca59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa62ede81ff7d43759148a1a8c212607.png)
更新时间:2016-12-04 18:10:13
|
【知识点】 三角函数的诱导公式
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】已知角
终边上一点
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8902bff3e60ecebdcd71bb2ee8bb97b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f772fe0275b9bdc54f40199380d3f09c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971bd7fb2a685e8f4ed19f92ec7e33f1.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】设函数
(其中a,b,
,
为非零实数),若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0044df5c4705f4cfd2d77e0b74eb0a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1277bd18d02073c7c26eaf17909bcbe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7450ecbbe9630e42533112af3fc9de67.png)
您最近一年使用:0次