本文给出了计算三角复合函数的定积分的若干方法。
In this paper we obtain several theorem of the definite integral of triangle composite function.
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。
In this paper by using the property of Fourier series a compound series consisting of trigonometric series and power series is established.
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