三角函数是高中数学中非常重要的内容之一,在高考中占的比例很大,是高中阶段继指数函数、对数函数、幂函数之后的又一具体函数模型。本文通过挖掘三角函数中的常见隐含条件,揭示其隐含的方式,还原其隐含的真面目,从而摆脱易陷的误区,寻找正确的解决方法。 Trigonometric function is one of the most important parts in high school mathematics. It accounts for a large proportion of the entrance exams. It is another concrete function model after high school, followed by exponential function, logarithmic function and power function. By digging the common implicit conditions in trigonometric functions, this paper reveals its implicit ways and restores the hidden truths so as to get rid of the erroneous zones and find the correct solutions.