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求和是小学乃至中学数学中一个十分普遍的问题,同时也是高中数学中一个重要内容,而三角函数求和问题是高中数学中一个重要内容,也是高考中一个重要考点,同时也是数学竞赛中一个重点内容。因此,高中数学中含有三角函数的求和问题显得非常重要。本文利用差分方程的思想给出含有三角函数求和问题的4个相关公式。
Summation is a very common problem in elementary school and even middle school mathematics. It is also an important content in high school mathematics. The summation of trigonometric functions is an important part in high school mathematics. It is also an important test in college entrance examination and also a Important content. Therefore, the summation of trigonometric functions in high school mathematics is very important. In this paper, we use the idea of difference equation to give four related formulas that contain the summation of trigonometric functions.