纵观2012年全国各地高考试题,三角函数的考题主要包括三角函数的图像与性质、简单的三角恒等变换、解三角形等。考查考生对三角函数的基础知识的掌握情况和运用三角公式对三角函数式进行恒等变形的能力。这类问题大多以三角函数的概念、图像和性质为背景,题目的难度不大,可供选择的解题方法也比较多。 Looking at the 2012 national examination questions, the trigonometric exam questions mainly include the trigonometric functions of the image and nature, a simple trigonometric transformation, solution triangle. Examine the candidate’s grasp of the basic knowledge of the trigonometric function and the ability to apply the trigonometric formula to perform the equivalent deformation of the trigonometric function. Most of these problems are based on the concept, image, and nature of trigonometric functions. The difficulty of the topic is not great, and there are many methods for solving problems.