已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adb0cbeaa8abbc5e920cc85bb4ce480.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536e072eb0439a5e5b430cd55a129374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adb0cbeaa8abbc5e920cc85bb4ce480.png)
更新时间:2019-12-27 14:59:36
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【知识点】 正、余弦齐次式的计算解读
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填空题-单空题
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容易
(0.94)
解题方法
【推荐1】若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e976891142f43f8b63cbadf4a040fe.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f125fd53e1adb7b35d7d69692bb34953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e976891142f43f8b63cbadf4a040fe.png)
您最近一年使用:0次
【推荐2】若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e3da6658f0630339be870036ea0b7e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02ad5bf06b18075b127e9da57e2a14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e3da6658f0630339be870036ea0b7e.png)
您最近一年使用:0次