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三角函数的解析式是研究三角函数的图象与各种性质的重要依据,确定三角函数的解析式是高中数学教学的重点,也是历年高考考查的热点.本文结合具体实例介绍求解三角函数解析式的几种策略,旨在探索题型规律,揭示解题方法,以期抛砖引玉.一、利用特殊化赋值法求解特殊化赋值法是数学解题中的一种重要方法,也是常用的解题技巧,特别是在求解选择题时,往往会有奇特效果.当然,在解答题中应用特殊化赋值法,往往也能简化过程,减少运算量.
The analytical expression of trigonometric function is an important basis for studying the image and various properties of trigonometric functions. It is the focus of high school mathematics teaching to determine the analytical function of trigonometric functions and is also the hot spot for college entrance examination in recent years.This paper introduces the solution of trigonometric function Of the various strategies aimed at exploring the type of questions to reveal the problem-solving methods, with a view to giving pointers to start with. First, the use of specialization assignment method to solve specialization is an important mathematical problem solving method is also commonly used problem-solving skills, Especially when solving multiple-choice questions, there are often peculiar effects, of course, the application of specialization in the solution to the problem often simplifies the process and reduces the amount of computation.