1 . (1)已知
都是锐角,
,
,求
;
(2)求
;
(3)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797d726f394a25c7062b736074a66722.png)
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecae966ab803d56b068ab2b97b913c57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a63bd634d1c14b0a530e81f0bb47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f5e8af5c6cfbecb2cdfbfb60dcdb1d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8bb045ecb127d4ac2d2e5181932fcbb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797d726f394a25c7062b736074a66722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0c14f4602e03caf421aea9512229a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183cbe08ab9388c58b8450f496e11d95.png)
您最近一年使用:0次
名校
解题方法
2 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3996200f2ab217efd8585fda2fdbd6.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bceba9ffcc43b7a737d0d3791961ea4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3996200f2ab217efd8585fda2fdbd6.png)
您最近一年使用:0次
2020-02-20更新
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4卷引用:北京市中国人民大学附属中学丰台学校2022-2023学年高一下学期月考(一)数学试题
北京市中国人民大学附属中学丰台学校2022-2023学年高一下学期月考(一)数学试题2020届浙江省杭州市第二中学高三12月月考数学试题2020届浙江省嘉兴市桐乡市高级中学高三下学期3月模拟测试数学试题(已下线)第5章 三角函数-2019-2020学年高一数学备战新高考新题型之双空题