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解读考纲一、三角部分:三角函数部分内容可以分为以下几块:1.三角函数的定义、同角函数关系、诱导公式.通过旋转将角的概念推广到任意角,利用类比的方法推导出任意角的三角函数的定义.其中,弧度制的引入为角的表示提供了方便,使角与实数建立了一一对应关系,使三角函数成为建立在实数集上的函
Explain the outlines of the first and the third part of the outline: The trigonometric functions can be divided into the following sections: 1. The definition of trigonometric functions, the relation of the same-angle functions, and the inducing formula. The concept of angles is extended to arbitrary angles by rotation, and is derived by analogy. The definition of the trigonometric function of any angle. Among them, the introduction of the radian system provides convenience for the representation of the angle, so that a one-to-one correspondence between the angle and the real number is established, making the trigonometric function a letter built on a real number set.