已知三角形ABC的内角A,B及其对边a,b满足a+b+acotA+bcotB,求内角C.求怎么理解?见到此类题首先考虑什么?解题过程别写了,就是问下遇见这种题,角变转换什么的?要考虑什么?就怕稍微变换一下数据 就
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![已知三角形ABC的内角A,B及其对边a,b满足a+b+acotA+bcotB,求内角C.求怎么理解?见到此类题首先考虑什么?解题过程别写了,就是问下遇见这种题,角变转换什么的?要考虑什么?就怕稍微变换一下数据 就](/uploads/image/z/3723913-1-3.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%86%85%E8%A7%92A%2CB%E5%8F%8A%E5%85%B6%E5%AF%B9%E8%BE%B9a%2Cb%E6%BB%A1%E8%B6%B3a%2Bb%2BacotA%2BbcotB%2C%E6%B1%82%E5%86%85%E8%A7%92C.%E6%B1%82%E6%80%8E%E4%B9%88%E7%90%86%E8%A7%A3%3F%E8%A7%81%E5%88%B0%E6%AD%A4%E7%B1%BB%E9%A2%98%E9%A6%96%E5%85%88%E8%80%83%E8%99%91%E4%BB%80%E4%B9%88%3F%E8%A7%A3%E9%A2%98%E8%BF%87%E7%A8%8B%E5%88%AB%E5%86%99%E4%BA%86%2C%E5%B0%B1%E6%98%AF%E9%97%AE%E4%B8%8B%E9%81%87%E8%A7%81%E8%BF%99%E7%A7%8D%E9%A2%98%2C%E8%A7%92%E5%8F%98%E8%BD%AC%E6%8D%A2%E4%BB%80%E4%B9%88%E7%9A%84%3F%E8%A6%81%E8%80%83%E8%99%91%E4%BB%80%E4%B9%88%3F%E5%B0%B1%E6%80%95%E7%A8%8D%E5%BE%AE%E5%8F%98%E6%8D%A2%E4%B8%80%E4%B8%8B%E6%95%B0%E6%8D%AE+%E5%B0%B1)
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