数学问题中条件有明有暗,明者易于发现便于利用,暗者隐含于有关概念、知识的内涵之中,含而不露、极易忽视,同学们在解题过程中稍不留心便导致解题出错．特别是解三角函数题目,因对隐含条件挖掘不够导致出现错误的现象尤为严重,那么隐含条件怎样挖掘呢？本文尝试通过实例作些粗浅探讨． The conditions in the mathematics problems are clear and dark, and the bright ones are easy to find and easy to use. The dark ones are implied in the connotation of concepts and knowledge. They are not exposed and easily overlooked. The students do not pay attention when they try to solve problems. Problem solving error. In particular, solving trigonometric function problems, due to the lack of implied conditions, which lead to the occurrence of errors is particularly serious, then how do you hide the implicit conditions? This article attempts to make some rough discussion through examples.