在微积分领域,三角函数的求导问题占据着很重要的位置,因此在中学教材里加入了这部分内容,但是一般都没有给出明确的求导过程和含义解释.这一方面是因为求导过程比较复杂,另一方面是由于学生数学基础知识还有局限性.本文试图从几何学的角度求解三角函数的导函数,并且得出了较为 In the field of calculus, the derivation of trigonometric functions occupies a very important position, so this part is added to the textbooks of secondary school, but generally no clear process of derivation and interpretation of meaning is given. This is because Guide the process is more complicated, on the other hand because of the basic knowledge of students there are limitations in mathematics.This paper attempts to solve the derivative function of trigonometry from the geometric point of view, and draws more