摘要
利用三角函数的变换关系式对三角函数积分中最常见的∫sinmxcosnxdx型、∫sinmxcosnxdx型。
By making use of the transformation of trigonometric functions, the article makes a detailed study of ∫ sin m cos n xdx, ∫ sin m xcos n x dx, ∫ 1sin m x cos n x dx, which are most common in the trigonometric integral.
关键词
三角函数
万能代换
有理函数式
积分
trgonometric functions
universal substitution
rational function