已知
,
,且
,
(1)求
的值:
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2081f4670de5a3d84ae96b519eade5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57c2cb50810b71b91dbcceb6eaa6969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed53925cace8212e87a4d3bad6463718.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
更新时间:2021-07-29 18:44:46
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解题方法
【推荐1】在
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![](https://img.xkw.com/dksih/QBM/2021/12/11/2870313655083008/2875145049522176/STEM/3ad6a50457b247e0ba460bc05e2f5485.png?resizew=285)
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![](https://img.xkw.com/dksih/QBM/2021/12/11/2870313655083008/2875145049522176/STEM/3ad6a50457b247e0ba460bc05e2f5485.png?resizew=285)
(1)求边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc926eacc4be32f1f59fd7a8e2b9a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77973fe66e58ee27ff694afa39a3a317.png)
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【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6187b6782aafc8bcd041c8acad23fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
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【推荐1】设
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【推荐2】已知
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a8e596c42ba9f7d2fb66040e44029a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3369fd6ba37be4ca88904ba0654a527.png)
(2)若
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【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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(1)求
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ac16d0f76dbbd50b8f8694068f619e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309654bb1bfb2032f9162d36dd0fa442.png)
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名校
【推荐1】已知函数
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![](https://img.xkw.com/dksih/QBM/2021/7/23/2770485626503168/2773094370762752/STEM/f188cf7c-e5ef-4943-b680-efee8bc9c5d5.png?resizew=215)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0534b203cbcdb913ce3e566214c21db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94db9e1a8b4047f57b9e777b44ba6a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1297adc8da264c530f915f9f100d3c0.png)
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解题方法
【推荐2】求下列各式的值:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3fa27a7a8b6e866d8abc13a61da346.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ff38e095249c85482be1dd37148832.png)
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3fa27a7a8b6e866d8abc13a61da346.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ff38e095249c85482be1dd37148832.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d781938328245c689dddd7517a93fc.png)
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【推荐3】已知为锐角,
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152f33e0c3380e2ddb3f35781a5b5314.png)
您最近一年使用:0次