已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc236e1554401b3166c776a469ae5eab.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00243acf27cba655c1fcefe80a29a9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc236e1554401b3166c776a469ae5eab.png)
更新时间:2023-06-14 16:19:53
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【知识点】 用和、差角的正切公式化简、求值解读
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【推荐1】某参考辅导书上有这样的一个题:△
中,
与
方程
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A.
B.
C.
D.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
你对这个题目的评价是_______________________________________ .(用简短语句回答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
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A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8b4bbd2f9912adfc9864c0e1e76a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
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你对这个题目的评价是
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【推荐2】若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ec7c99202b44d5d65239f65f155b6f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381c22e33e2648a85c1ac3a575adce6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ec7c99202b44d5d65239f65f155b6f.png)
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