一题多解巧用正余弦定理

Multiple solutions to a problem using the sine cosine theorem

正、余弦定理是在三角形解决边角关系问题中的重要定理。本文从一道习题出发,讨论了应用正、余弦定理的不同解法,有效地扩宽了解题思路,为高中数学学习提供经验和借鉴。

Sine and cosine theorems are important theorems for solving the problems of relationship between edges and corners in a triangle. This paper, starting from an exercise, discusses the different solutions using positive and cosine theorems, which effectively widens the idea of solving the problem and provides experience and reference for high school mathematics learning.