(1)已知
,
为第四象限角,求
的值;
(2)已知
,求:
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b4cab645c97f6d1710f803ef6a8436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7aee715ac87a76f7a00996af77481ed.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e327f9331fb6640f4fc177cdc8dc958f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7243c26f07952c7ce8b2564b70c0572c.png)
更新时间:2019-12-31 16:27:10
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】(1)已知
,
,求
的值.
(2)设
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,
求①
的值;②
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f466e61b61cb3bacc0836062f810e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414ab182e9a30cdab79d1d08124c7400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8aaf830ba8ed8a772923d908ee966e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e291b29e8a914334eabe4c3d7e21ad9.png)
求①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ba4f4450d63609ad3665858d35d82e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c6a696b4e52c75848d7b02ea3d31ee.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】已知
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bedd661e8552acc66992229b744c58d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03342454dbb8b0dfd13417519fb37f7a.png)
您最近一年使用:0次
解答题-问答题
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适中
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【推荐1】已知
,
,
分别为
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,
的对边,且
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(1)证明:
;
(2)若
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的中点,且
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,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75345974e3857593e544294a478449a7.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f756d66eb0e623a391733dbf7c4f7c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d39e8c6fc9149d6290c493a65bdc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知
.
(1)若
是
的一个内角,且
,求
的值;
(2)已知
,
,
,求
的值.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6b0087c0efa96dc4097f07ad0f748b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefeebfdf2f30fe359867e3d545a565e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76acd78dd383b522faa6e69fae1aab2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f2f86d10cd02fc63752855aa0e5084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0399c78088b4c6fc231a0a5c7a9918.png)
您最近一年使用:0次