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三角函数是初等数学的重要组成部分,既是高中数学的重点内容,又是从中学到大学继续深造学习的必备基础知识.三角函数除了具备一般函数的各类性质外,它的周期性及独特的对称性,再加上丰富的三角公式,使其产生的各种问题丰富多彩,层次分明,变化多端.围绕三角函数的考题总是以新颖的题型出现,在高考试卷上占据重要位置,
Trigonometric function is an important part of elementary mathematics, which is not only the key content of high school mathematics, but also the necessary basic knowledge for further studies from middle school to university.Though the trigonometric functions possess all kinds of properties of general functions, the periodicity and uniqueness Of the symmetry, coupled with a rich triangular formula, so that the problems arising from its rich and varied, structured and varied.Critical questions around the trigonometric function is always a novel question appeared in the entrance examination papers occupy an important position,