已知
,且
为第二象限角.
(1)求
的值;
(2)求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cb62a2f6173c692b4b2c742f7131f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f554a5746827cf9ebad7bdfd4abe91c.png)
更新时间:2022-01-08 10:53:23
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【推荐1】已知
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【推荐2】求解下列各题.
(1)已知
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(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c1fc049a87888752174ddea4187c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f331c3d96c5812a620e326373747eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7fdccadfa7469825f8a5ccbf495c24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d450aea0fb89e956fc4caa3a9c59fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3035d1b857732b26d610b5675a59739b.png)
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9052001bb15ff67ba2fb147b6198462c.png)
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解答题-问答题
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适中
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解题方法
【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5a43b39c775f6431184a887541ec52.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefeebfdf2f30fe359867e3d545a565e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76acd78dd383b522faa6e69fae1aab2c.png)
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解答题-问答题
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适中
(0.65)
【推荐2】在
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;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62e7045ca3913da1b6dda890438ad1f.png)
(1)利用正弦定理证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5ca418ff0d36929cd06551f74d58c2.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434b2f19e2e8b8f5b64d3a0202446186.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9aabcc24a7bf13c256ca2bd8f11a6f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da057debb0441ab76ea3b829571f1ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9aabcc24a7bf13c256ca2bd8f11a6f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6521a04a1d4fc16d326ad7270cf4e636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9aabcc24a7bf13c256ca2bd8f11a6f.png)
您最近一年使用:0次