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利用三角法证几何题,是一种常用的方法。几何中有大量问题都可以用三角法加以解决。 用三角法证几何题,有以下优点: 1.几何法往往需要作比较巧妙的辅助线,而三角法在许多情况下,利用现有的图形,不需或少需辅助线,而且辅助线一般说来也比较明显,比较容易想,因而使图形比较简洁。 2.由于三角法是利用对含有三角函数的式子进行化简,计算,证明来进行证明,而这样的方法常常有成法可循,思路一般说来比几何法要简单些,容易被学生所理解、掌握。不单是思路,就是证明过程在
The use of triangular forensic geometry is a common method. A large number of problems in geometry can be solved by trigonometry. With the trigonometric forensic geometry problem, there are the following advantages: 1. The geometry method often requires more ingenious auxiliary lines. In many cases, the trigonometric method uses the existing graphs, requires no or less auxiliary lines, and the auxiliary lines are generally Obviously, it’s easier to think about it, and it makes the graphics more concise. 2. Because the trigonometry is to simplify, calculate, and prove the formulas that contain trigonometric functions, such methods often have methods to follow, and the ideas are generally simpler than the geometric methods and are easily accessible to students. Understand and master. Not just ideas, but proof processes