近几年高考加强了对三角函数图象与性质的考查,特别是三角函数有关对称性,通常情况下,一般需要利用性质定义去解决,有时解答思路烦琐．若抓住图象特怔,利用导数解决,则能起到事半功倍的作用．本文例举几题,为加强对比,每题给出传统解法与导数法,以示考生借鉴． In recent years, the college entrance examination has strengthened the examination of trigonometric functions and properties, especially the symmetry of trigonometric functions. Under normal circumstances, it is generally necessary to use the nature of the definition to solve, and sometimes the solution ideas are cumbersome. If you take advantage of the special features of the image and use derivative solutions, you can do more with less. This article gives a few examples, in order to strengthen the contrast, each question gives the traditional solution and derivative method to show that the candidate learn from.