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1讲小题考法——三角函数的图象与性质课件.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1讲 小题考法三角函数的图象与性质,栏,目,导,航,考点一 三角函数的图象及应用,2.三角函数图象平移问题处理的“三看”策略,B,B,1求函数单调区间的方法 (1)代换法:求形如yAsin(x)(或yAcos(x)(A,为常数,A0,0)的单调区间时,令xz,得yAsin z(或yAcos z),然后由复合函数的单调性求得 (2)图象法:画出三角函数的图象,结合图象求其单调区间 2判断对称中心与对称轴的方法 利用函数yAsin(x)的对称轴一定经过图象的最高点或最低点,对称中心一定是函数的零点这一性质,通过检验f(x0)的值进行判断,考点二 三角函数的性质及应用,B,D,A,考点三 三角函数的值域与最值问题,谢,谢,观,看,

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