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余弦定理和正弦定理在运用的过程中,通常是和三角函数联系在一起,通过余弦和正弦的定义以及使用特点,求出关于三角形边角以及面积的函数关系式。本文主要对余弦定理的特点进行了分析,并通过相关例题的解答,加深学生对余弦定理的理解,以此使高中学生全面掌握余弦定理相关知识点的目的。
The cosine and sine theorems are usually associated with trigonometric functions in the course of their application. The cosine and sine definitions and the characteristics of their use determine the function of the triangle’s corner and area. This paper mainly analyzes the characteristics of the cosine theorem and deepens the students’ understanding of the cosine theorem through the solution of the relevant examples so as to enable the high school students to fully grasp the purpose of the cosine theorem related knowledge points.