(1)计算
的值;
(2)已知
为锐角,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c397b40894d8b555e5d24687214db4.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28a75267f4aa1a9ba742f9193d1ed1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
更新时间:2022-09-29 17:01:47
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解答题-问答题
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解题方法
【推荐2】已知
,
.
(1)求
的值;
(2)若
,且
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c54d437dbfdad6678622520e1d544be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a837149d753a3457daeb1eef3a90f05.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6369cd1db768436809404b1f3c4132c0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f07029c97c324d32f258f18a96654a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e4009eab39726dd08fdf7bb75a3eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
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解答题-问答题
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较易
(0.85)
名校
解题方法
【推荐1】在
中,角A,B,C所对的边分别为a,b,c,
.
(1)若
,求
的值;
(2)若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4d95608fd2df8254150e0b9da15649.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f41cb252b9b4ed62594da3371a5c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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较易
(0.85)
解题方法
【推荐2】
的三个内角
对边分别是a、b、c,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc84476d6d7b6f7bf9eda8455e1509ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9781d39c89bec1f36c1fab10aa682c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44315d3429e4d76842ecfc14f1ca949.png)
(1)角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f015ed8e497b4394053ddd19683a98f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
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