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形数结合是数学的基本方法之一.本文的目的是想用形数结合的方法,把一些抽象的反三角函数问题变得形象直观,加深学生对这些反三角函数关系式(例1、例2是课文中的重要关系式)的理解和记忆.为形数结合的基本方法提供几个新颖的实例. 先由两个三角恒等式 sin(1/4π+x′)=cos(1/4π-x′)(1)
The combination of number and number is one of the basic methods of mathematics. The purpose of this paper is to use the method of combination of numbers to visualize some abstract inverse trigonometric functions, and to deepen the student’s relation to these inverse trigonometric functions (Example 1, example). 2 is the understanding and memory of the important relational expressions in the text. Provides several novel examples for the basic method of the combination of form numbers. First by two triangular identity sin(1/4π+x′)=cos(1/4π- x’) (1)