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一、教学内容解析“任意角的三角函数”是函数的下位概念,函数是刻画现实世界运动变化规律的重要数学模型,作为基本函数之一的任意角的三角函数,是刻画匀速圆周运动的重要数学模型,是匀速圆周运动的最本质的体现.研究匀速圆周运动一方面要研究角θ的变化,最重要的是研究圆上动点P(x,y)的变化,即x,y关于角θ
First, the teaching content analysis “Trigonometric function of arbitrary angle ” is a subordinate concept of the function, the function is an important mathematical model to describe the law of the movement of the real world. As one of the basic functions, the trigonometric function of any angle is to describe the uniform circular motion The most important mathematical model is the most essential manifestation of uniform circular motion.Studying uniform circular motion on the one hand to study the change of the angle θ, the most important is to study the change of circular motion point P (x, y), that is, x, y About angle θ