“温故”,可以“知新”,但是教师必须安排好从“温故”到“知新’的教学层次。也就是说,在新授课中,可以首先复习相关联的知识或者方法实质类似的旧题,使学生有发挥联想的基础,从而从复习旧知识中悟出新问题的解法.在“三角方程”的教学中我们就采用了“温故知新”的方法。在学过最简单的三角方程(如 sinx=a)的通 However, the teacher must arrange the teaching level from “warmth to death” to “new knowledge.” In other words, in new lectures, you can first review the related knowledge or methods that are similar in substance to the old ones Problem, so that students have to play the basis of the association, so that from the review of old knowledge to understand the problem of new solutions in the teaching of the “trigonometry” we adopted the “warmth to know new.” In the study of the simplest trigonometry sinx = a)