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三角恒等变换是三角函数的重要内容,也是高考必考查的方法技能,因其公式较多,用法灵活,给学生造成了一定的学习难度.但若熟练掌握公式的推导过程,熟悉各公式在恒等变换中的作用,掌握一些常见的三角变换方法,就能在解决三角化简、求值、证明等问题时,合理灵活地选择公式,进行三角恒等变换,提高分析和解决问题的能力.下面介绍三角恒等变换中几种常用方法.一、“角”的变换在三角化简、求值、证明中,条件和结论中往往出
Triangle constant transformation is an important part of the trigonometric function, but also the method of examination of the college entrance examination skills, because of its more formulas, flexible usage, to the students caused a certain degree of learning difficulty.But if the master of formula derivation process, familiar with the formula In the process of equality transformation, some common trigonometric transformation methods can be mastered to solve the problems of trigonometry simplification, evaluation and proving, so that the formulas can be selected rationally and flexibly, the trigonometric identities transformation can be carried out, and the ability of analyzing and solving problems can be improved. Here are a few commonly used methods of triangular identity transformation. First, the transformation of “angle ” is often used in the simplification, evaluation, proof, conditions and conclusions of triangulation