trigonometric series

• 三角级数

trigonometric series的用法和样例：

例句

1. In this paper, by using the property of fourier series a compound series consisting of trigonometric series and power series is established.
   摘要利用由三角级数和幂级数复合构成的函数项级数的有关性质，得到了一类变系数非齐次调和方程边值问题的级数解。