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实行开放式教学 ,发扬教学民主 ,让学生直接参与教学过程 ,能充分调动学生的学习积极性和主动性 .教师要积极鼓励学生独立思考 ,敢于“标新立异”,发表独立见解 ,努力探索解题的新途径 .例 1 求 sin2 10°+ cos2 40°+ sin10°cos40°的值 .一般解法是 :原式 =1- cos2 0°2 +
The implementation of open teaching, the development of teaching democracy, and the direct participation of students in the teaching process can fully mobilize the students’ enthusiasm for learning and initiative. Teachers should actively encourage students to think independently, dare to “innovate,” express independent opinions, and strive to explore new problems. Pathway. Example 1 Find the value of sin2 10°+ cos2 40°+ sin10°cos40°. The general solution is: the original = 1 - cos2 0°2 +