已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcaef030c2faa4c69a022b2e5036e80.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2331c755ff3034217ea3d9f45b25f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcaef030c2faa4c69a022b2e5036e80.png)
更新时间:2023-04-14 16:42:46
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解题方法
【推荐1】已知
则![](https://img.xkw.com/dksih/QBM/2016/10/10/1573060768489472/1573060774428672/STEM/b3afcf833f79419c9c089366ab735988.png?resizew=68)
______ .
![](https://img.xkw.com/dksih/QBM/2016/10/10/1573060768489472/1573060774428672/STEM/40c6e122d48f46d2b96003c1e2e41fb2.png?resizew=88)
![](https://img.xkw.com/dksih/QBM/2016/10/10/1573060768489472/1573060774428672/STEM/b3afcf833f79419c9c089366ab735988.png?resizew=68)
您最近一年使用:0次
填空题-单空题
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较易
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【推荐2】已知
是第四象限角,且满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a681e03d07d29057ade42ded309815d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
您最近一年使用:0次
填空题-单空题
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解题方法
【推荐1】已知
是三角形的一个内角,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d095b61adf298578d16a21d87463b7f.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db73deb6fa502e49e3c873ef076fbc32.png)
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您最近一年使用:0次
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解题方法
【推荐2】已知
,
,
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________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbe2212c10c3da621f550e8c6409bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c40f09bd444276b0e9939f052bfd782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b80751c98f9991b9cfc03923a98834.png)
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【推荐1】已知角
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐3】已知等腰三角形一个底角的正弦值为
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您最近一年使用:0次