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本章是在学习三角函数、平面向量的基础上,通过对任意三角形边角关系的探究,发现并掌握三角形中的边长与角度之间的数量关系,并运用它们解决一些与测量和几何计算有关的实际问题。本章的主要内容是两个重要定理,即正弦定理和余弦定理以及这两个定理在解斜三角形中的应用。以三角形为载体,考查学生分析问题、判断能力是高考命题的一个重要方向,而同学们在解这部分问题时,经常因为考虑不周、审题不细、公式运用不当等原因而出错。下面就解三角形中的常见易错点进行分
Based on the study of trigonometric functions and plane vectors, this chapter explores the relationship between the edges of any triangle and the relationship between angles by using triangulation. By using them to solve some problems related to measurement and geometry calculation The practical problem. The main contents of this chapter are two important theorems, that is, sine and cosine theorems and the application of these two theorems in solving oblique triangles. To triangles as a carrier, examining students to analyze problems, ability to judge is an important direction of the college entrance examination proposition, and students in solving this part of the problem, often because of ill-considered, moderation is not fine, improper use of formulas and other mistakes. The following triangle solution of the common error points for points