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从考纲上看,文、理科对三角函数的图像和性质的要求从了解提升为理解,只是对近年来高考现状的一种认可,并无再度提高之意。考生应能比较熟练地画出三角函数图像,理解诸性质,如对称中心、对称轴、周期、单调区间、最大值、最小值(极值)等问题;要注意先化简三角函数式,再研究它的图像和性质。
From the syllabus point of view, the requirements for the image and nature of trigonometric functions raised by literature and science have been promoted from understanding to comprehension, but it is only a recognition of the status quo of the college entrance examination in recent years, and it has no intention of further improvement. Candidates should be able to draw trigonometric images more skillfully and understand the properties such as symmetry center, axis of symmetry, period, monotonous interval, maximum value, minimum value (extreme value), etc.; pay attention to simplify the trigonometric function first, then Study its image and nature.