化简:(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c92ff7dfbb0647ffd592204659c5ed2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c395d1afb709aad9bcd2a02bc61d9d.png)
更新时间:2018-04-10 23:34:36
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知
是第三象限角,
.
(1)若
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7cdfb87468f4af5119737b427afe8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1ba6b6ee00c4b2763cb3fa59caa69f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd448679c7f472666d775229ab98e115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1ba6b6ee00c4b2763cb3fa59caa69f.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐2】已知角
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(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cded629fcbf95930e1d6bd593768d0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d13cc23e78a631176c31bdf430dbe57.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f55b8836b41be612a52ca9caf97006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561c987a117a69acc5799c8a5b58001b.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在
中,内角A、B、C的对边分别是a、b、c,
,
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(2)记
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f34365e5040ce6944115c8da61bf110.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885b399ef87cef3372eb758165ad1e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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适中
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【推荐2】已知函数
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(1)求
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8b002680c476b8323c4b67e8bc999e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be105f191f7be435e269132e73abff34.png)
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