一、关于正弦定理解斜三角形是三角教学目的之一。为此,我們必須对解斜三角形所根据的重要定理作透徹的講解,使学生通过对这些內容的理解並借助于各种表能解决有关斜三角形的問題。正弦定理正是这些定理中最重要的一个,因此,必須引起学生的足够重視。 First, understanding the sinusoidal understanding of oblique triangles is one of the purposes of teaching triangles. To this end, we must thoroughly explain the important theorems on which the oblique triangles are based, so that students can solve problems related to oblique triangles by understanding these contents and by means of various tables. The sine theorem is the most important of these theorems. Therefore, students must be given sufficient attention.