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二面角的传统求法是构造平面角所在的三角形,利用三角函数的知识,求得二面角的值.向量法是有别于传统的一种独特方法,它不但减少了大量的辅助作图以及对图形的分析、想象,而且还可以解答一些用传统方法难以解决的求二面角问题.
The traditional method of dihedral angle is to construct a triangle where the plane angle is located. Using the knowledge of the trigonometric function, the value of the dihedral angle is obtained. The vector method is a unique method that is different from the traditional method. It not only reduces the number of auxiliary graphs. As well as analyzing and imagining graphics, it is also possible to solve some dihedral angle problems that are difficult to solve with traditional methods.