“三角函数”是数学的重要工具,它在数学的各个分支中都有着广泛的应用,在历年的高考试题中都占有相当的比例.由于高考试题中的三角函数试题较容易,往往不能引起考生的足够重视,导致失分现象屡屡发生.笔者根据多年的教学经验,对学生的常见错误加以分析,供读者参考.一、错用“辅助角”在历年高考试题中,有很多题目经过恒等变换转化成y=Asin(ax+φ)(φ>0,|φ|<2π)的形式,由于考生对“两角和与 The ”trigonometric function“ is an important tool for mathematics. It has a wide range of applications in all branches of mathematics, and it occupies a considerable proportion of high test questions over the years. Because trigonometric tests in high test questions are easier, they often cannot Caused the examinee’s enough attention, resulting in repeated occurrences of the phenomenon. The author based on many years of teaching experience, analyzes the common mistakes of students, for readers to refer to. First, misuse ”assistant angle" in the past years high exam questions, there are many The title is transformed into y=Asin(ax+φ)(φ>0,|φ|<2π) in the form of an identity transformation because of the candidate’s two angles and