This paper compared the exercises of trigonometric functions between Chinese and American high school textbooks from three aspects, which included the number, the type and the synthesis difficulty of exercises. The synthesis difficulty was analyzed from five difficult factors, namely inquiry, background, calculation, reasoning and content of knowledge. The result showed that there were some differences between the exercises of Chinese and American Mathematics Textbooks in those three aspects. These differences were of enlightening significance to the compiling of Mathematics Textbooks in our country.%从教材习题的数量、类型以及综合难度3个方面比较中美高中数学教材中有关三角函数的习题,而综合难度又从探究、背景、运算、推理和知识含量 5 个难度因素进行分析.结果发现,中美数学教材的习题在数量、类型、综合难度 3个方面都存在一定的差异,这些差异对中国数学教材编写具有启示性的意义.
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