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一、知识要点和学习要求 1.理解任意角的概念、弧度的意义,并能正确地进行弧度与角度的换算. 2.掌握任意角的三角函数定义,三角函数的符号,并会利用与单位圆有关的三角函数线表示正弦、余弦和正切;掌握同角三角函数的基本关系式掌握正弦、余弦的诱导公式.
First, knowledge points and learning requirements 1. Understand the concept of arbitrary angles, the significance of arcs, and can correctly convert the arc and angle. 2. Grasp the trigonometric function definition of any angle, the symbol of the trigonometric function, and will use and unit Circle-related trigonometric function lines represent sine, cosine, and tangent; grasp the basic relationship of the trigonometric function of the same angle to master sine and cosine induction formulas.