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一个新的数学概念的建立和一个新的数学符号的掌握和使用,对学生来说,常常是个困难的问题,反三角函数尤为如此。在高中课本中对反三角函数都有简明的定义。如
The establishment of a new mathematical concept and the mastery and use of a new mathematical symbol is often a difficult problem for students, especially in terms of inverse trigonometric functions. In high school textbooks, there are concise definitions of inverse trigonometric functions. Such as