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直角坐标系中的单位圆是研究三角函数的重要工具.在三角函数的教学中,应发挥单位圆的作用.单位圆可以帮助学生直观地认识任意角、任意角的三角函数,理解三角函数的周期性、诱导公式、同角三角函数关系式,以及三角函数的图象和基本性质.借助单位圆的直观,教师可以引导学生自主地探索三角函数的有关性质,培养他们分析问题和解决问题的能力.
The unit circle in Cartesian coordinate system is an important tool for studying trigonometric functions. In the teaching of trigonometric functions, unit circle should be played. Unit circle can help students intuitively understand the trigonometric functions of any angle and arbitrary angle, and understand the function of trigonometric function Periodicity, Inducing Formulas, Equations with Horn, and Images and Fundamental Properties of Trigonometric Functions With the help of a unit circle, teachers can guide students to autonomously explore the relevant properties of trigonometric functions, train them in analyzing and solving problems ability.