2019版高考数学二轮复习第1篇专题2三角函数、解三角形第3讲大题考法——解三角形课件.ppt

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二轮专题突破,第一篇,专题二 三角函数、解三角形,第3讲 大题考法解三角形,考向一 正、余弦定理的基本应用,技法总结 用正、余弦定理求解三角形基本量的方法,变式提升 1(2018揭阳三诊)在ABC中,角A,B,C所对的边分别是a,b,c,且acos C(c3b)cos A0 (1)求tan A的值; (2)若ABC的面积为,且bc2,求a的值,【典例】 (2017全国卷)ABC的内角A,B,C的,考向二 与三角形面积有关的问题,技法总结 与三角形面积有关的问题的解题模型,谢,谢,观,看,

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