更新时间:2020-02-03 22:10:06
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【知识点】 三角函数恒等式的证明——同角三角函数基本关系解读
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解答题-证明题
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【推荐1】已知
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065f131d49f2f36219e6001bc5ac2d38.png)
(1)求证:
;
(2)求
的值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f55b8836b41be612a52ca9caf97006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e744af0f65e797a35d976c20f2dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c4e6f9c76fa9a1688d12b3ab5da6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065f131d49f2f36219e6001bc5ac2d38.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ced75b8a61b973f828c24df13ef6e69.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47c3a0b29596d9c03180639aa4add8a.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
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