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正、余弦定理是高中数学的重要内容之一,也是高考考查的重点和热点,在历年高考中占有较为重要的地位。正、余弦定理常与三角函数联系在一起,以正、余弦定理为工具,通过三角恒等变换来解决问题。近年高考中的题目多以中低档题出现,选择题、填空题、解答题形式都有出现,重点考查的是基础知识、基本技能和基本思想方法。
Positive and cosine theorem is one of the important content of high school mathematics, but also the focus and hot spots for college entrance examination, college entrance examination in the calendar occupy a more important position. Positive and cosine theorems often associated with trigonometric functions, positive and cosine theorems as a tool, through the triangular equivalent transform to solve the problem. In recent years, most of the questions in the college entrance examination appear in the middle and low questions, multiple choice questions, fill in the blank questions, answers to questions have emerged, the key test is the basic knowledge, basic skills and basic thinking.