求值:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14634d8cb6659f0a35c6b00eaa8b1188.png)
(2)已知
,求
的值
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14634d8cb6659f0a35c6b00eaa8b1188.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec393eec45c4b0d474902b23c3d70bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c5658ffa34c49bbe7263692ffdd3aa.png)
更新时间:2023-02-17 15:52:36
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解答题-证明题
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【推荐1】已知锐角三角形
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(Ⅰ)求证:
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(Ⅱ)求
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(Ⅰ)求证:
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(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
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解答题-问答题
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名校
解题方法
【推荐2】已知角
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef930b4f4895f1fb731db6f0c02df313.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
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解答题-计算题
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【推荐2】已知
.
(1)若
是第三象限角,求
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(2)先化简再求值:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51474d91e540a475138571e8738de850.png)
(1)若
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(2)先化简再求值:
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【推荐3】(1)求证:
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(2)求证:
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