已知
中,
分别是角
所对的边,若
,则角
的大小为
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043169792/STEM/aa4ebf770e5d4d68b70cdf8fe35e5d07.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043169792/STEM/2cd68d9fb9e4499fa9e440dc5334ab8a.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043169792/STEM/943285cbfd5741bda3d723aaeffa4513.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043169792/STEM/37db4428c3584b9487f09d7912269d0b.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043169792/STEM/b48efa3d4fd743e6b5eaf8d56f4c7779.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-04 22:14:18
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