已知
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f095b6fa0d002f81c72ae76d382c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41ecddc074a8c088af793c5d260bb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b04da7eac640b5b735da7fb5da8cfd.png)
20-21高一·上海·假期作业 查看更多[1]
(已下线)专题07+两角和与差的余弦、正弦和正切-2020-2021学年新教材高一数学寒假辅导讲义(沪教版2020)
更新时间:2021-03-11 18:57:32
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真题
【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619ab2426c8eb843a1897008dd38c139.png)
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【推荐1】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e817092540f2ca427b8674d8f51dac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4352dfe95446ab24b2c5aba37a13b59.png)
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(1)若
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(2)若
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