三角函数是基本的初等函数之一。它蕴含的公式多、变化多，是初等数学的重点内容。本文通过分析历年高考试题中出现的有关三角函数题．来阐述如何更好地把握对三角函数的这一部分内容的教学。%Trigonometric function,the key content of elementm mathematics and one of the basic elementary functions,contair many formulas and changes.Based on the analysis of the trigon. ometric function problems in previous years＇ college entrant examination, this paper elaborates on how to better grasp th teaching of trigonometric function.
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