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这里的三角证法是指运用三角知识(和部分代数知识)转化、进而解决几何问题的方法,它是一种典型的以形寻数、数形结合的方法。用三角法解几何问题的基本思路是,利用三角函数的有关知识,将有关几何元素的关系式转化为三角函数关系式,即,将几何问题三角化,借助于三角变形和一些代数变形最终解决给定问题。
The triangular proof method here refers to the method of using trigonometric knowledge (and some algebraic knowledge) to transform and then solve the geometric problem. It is a typical method of finding the number and the combination of numbers and shapes. The basic idea of using the trigonometric method to solve geometric problems is to use the knowledge of the trigonometric function to convert the relational formulae of the geometrical elements into the trigonometric function relational equations. That is, to triangulate the geometrical problems and finally solve them by means of triangular deformations and some algebraic deformations. Given the problem.