化简下列各式:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6647a031c16345ed8f23fb0c688612c6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8acceb2a022297327f5c938a033d77a8.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8111bbab23d7c9865f4d754153e7d7b2.png)
21-22高一下·四川内江·阶段练习 查看更多[2]
四川省内江市第六中学2021-2022学年高一下学期第一次月考数学(理科)试题(已下线)专题5.9 三角恒等变换(重难点题型精讲)-2022-2023学年高一数学举一反三系列(人教A版2019必修第一册)
更新时间:2022-04-27 23:24:05
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解题方法
【推荐1】在
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对应的边分别是
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,
.已知
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(1)求角
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723d3cb3bd739329cb6c76362c811701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadd2e6f0aa16c2c466c904474ffc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
(ⅰ)求边长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93756f6a6eea8cb219e60ab45885e05c.png)
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解答题-问答题
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较易
(0.85)
【推荐1】已知
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a804ed43f6759074fe6a23877f07e1.png)
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解答题-问答题
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较易
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名校
【推荐2】已知在锐角
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(1)证明:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98320c270e3623839b2dc4723e0ee396.png)
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