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三角形问题历来是三角函数中的重点和难点,最近几年的高考也常涉及此类题目.高中数学新教材(试验本)在平面向量一章中,用一个单元对解斜三角形做了理论上的阐述和实际应用的示范.本着源于课本、高于课本的精神,对三角形问题作适度的升华,特别是对三角形题目的常规变换思路作一总结,可以使我们再遇到此类问题时,能够做到心中有数和应对自如.
The triangle problem has always been a key and difficult point in trigonometric functions. The college entrance examinations in recent years often involve such topics. The new textbook for high school mathematics (experimental) has theoretically used a unit to solve oblique triangles in a chapter on plane vectors. The elaboration and demonstration of practical application. Based on the spirit of textbooks and textbooks, the moderate sublimation of triangular problems, especially the summary of the conventional transformation of triangle topics, can make us encounter such problems again. At that time, I was able to know what I was doing and how to deal with it.