函数的单调性是函数的一个重要性质,研究任何一个基本初等函数都少不了要研究它,三角函数的单调性同样是一个重点也是一个难点.本文结合教学过程中学生常犯的三类典型错误进行剖析探究,希望对大家有所帮助. The monotonicity of a function is an important property of a function, and it is indispensable to study any basic elementary function to study it. The monotonicity of a trigonometric function is also an important and difficult one .This paper analyzes three kinds of typical mistakes often made by students in the teaching process Explore, hope to be helpful to everyone.