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一、制作的目的: 在平面几何学中,学生学习到锐角三角函数这一章,或者初学三角时,常常对三角函数的定义,记忆不清,函数值的得来,也觉得不够直观。讲到三角函数值的变化时,哪些是增函数,哪些是减函数,也常常混浠不清,因而到检查函数表时,对修正值的增减处理,更觉得模糊不清,影响了直角三角的解答的正确性。我认为这些,都由于在教学过程中没有能善于运用直观教具,使学生们深切了解基本概念;也没有能使学生们通过实习作业,自觉地,牢固掌握已学的知识;灵活运用来解决实际问题。学生们:每每是生吞活剥的、依样画葫芦的,听了些、看了些、做了些,引不起浓厚的学习兴趣;更不够了解数学知识对生产技术的重要性。希望通过教具的制作稍稍补偿一些缺陷,因此考虑了这一简单教具的制作。
First, the purpose of production: In the plane geometry, students learn the acute angle trigonometric function chapter, or beginner triangle, often the definition of the trigonometric function, memory is unclear, the value of the function derived, but also that is not intuitive enough. When talking about changes in trigonometric function values, which are increasing functions and which are decreasing functions, they are often confused. Therefore, when checking the function table, the correction value is more or less blurred and affects the right angle. The correctness of the solution of the triangle. I think these are all due to the fact that they are not good at using visual aids in the teaching process, so that students can understand the basic concepts in depth; nor can they enable students to work through internships and consciously and firmly grasp what they have learned; and use them flexibly to solve practical problems. problem. Students: Every time they are devoured and hungry, they listen, read, and do something, and they can’t afford a strong interest in learning. They don’t know enough about the importance of mathematical knowledge to production technology. It is hoped that some defects will be slightly compensated through the production of teaching aids, so the production of this simple teaching aid is considered.