现代数学教学把发展学生的思维提到了相当高的地位 ,把数学喻为“思维的体操”。在中学数学教学内容中 ,“三角函数”有着十分重要的地位 ,由于其思考性、方法性、技巧性、目标性都较强 ,应用十分广泛 ,特别在“三角变换”的运算中 ,涉及的知识面较广 ,方法灵活多样 ,对于培养学生的智力品质 ,起着十分重要的作用 Modern mathematics teaching to develop the thinking of students referred to a very high status, the mathematics as “thinking gymnastics.” In the teaching content of middle school mathematics, “trigonometric function” has very important position, because of its thinking, method, skill, target is strong, a wide range of applications, especially in the “triangular transformation” operation, involved A wide range of knowledge, methods and flexible, for the training of students intelligence quality plays a very important role