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三角函数是中学数学的重要内容,也是高考命题的热点,三角函数常与代数、几何等知识渗透在一起,以其奠基性、工具性、综合性等特征而成为高中数学和高考的重点内容.而本节三角函数的概念及公式则是本章的基础,是三角函数图象和恒等变换的最终着落点.
Trigonometric function is an important part of high school mathematics. It is also a hot topic of college entrance examination proposition. Trigonometric function often permeates with knowledge of algebra and geometry, and becomes the key content of high school mathematics and college entrance examination with its foundation, instrumental and comprehensive characteristics. The concepts and formulas of trigonometric functions in this section are the basis of this chapter, which are the final landing points of trigonometric function images and identity transformation.