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复数的简单应用在中学数学教学中是很有必要安排的,它可以使学生进一步掌握复数的代数运算及其运算的几何意义,也为以后的学习打好基础,并对沟通不同部分的知识,促使学生在分析问题,解决问题诸方面的能力有所提高,这里,想通过几个问题的探讨来阐述复数的应用。例1:证明“余弦定理”这是今年高考数学试题中的一题,它的证明可以是多种途径的,现应用复数对它进行证明。证明: △ABC为任意三角形,取如图所示的坐标,
The simple application of plurals is very necessary for middle school mathematics teaching. It enables students to further understand the geometric meanings of complex algebraic operations and their operations, lay the foundation for future learning, Promote students in the analysis of the problem, the ability to solve problems has improved, here, would like to discuss the issue through several to elaborate on the application of plural. Example 1: Proof “cosine theorem” This is a question in this year's college entrance examination math test, which can prove a variety of ways, it is proved by the complex number. Proof: △ ABC for any triangle, take the coordinates shown in the figure,