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从高中数学的整体来看,三角函数内容所占比重较大,必修4(人教A版)中有两大章节《三角函数》和《三角恒等变换》,必修5中也有一章与三角函数密切相关的《解斜三角形》;但从高考角度来看,三角函数内容不仅涉及不多,而且所涉试题一般都是基础型的.可能正是因为以上原因,三角函数练习、习题、例题虽然非常之多,但因为缺少新鲜血液(质优高考题)的注入,以致三角函数部分教辅习题过于典型而略显陈旧,有时想把陈题稍做翻新,可能又会因考虑欠
From the overall point of high school mathematics, the proportion of trigonometric functions is relatively large. There are two major chapters in the Compulsory 4 (Teaching A Version) “trigonometric functions” and “triangular identity transformation”. There is also a chapter in Compulsory 5 and the triangle Function is closely related to the “solution to the triangle.” However, from the perspective of college entrance examination, the trigonometric functions involve not only much, but the questions are generally based on the type may be precisely because of the above reasons, trigonometric function exercises, exercises, examples Although very much, but because of the lack of fresh blood (high quality test questions) into the part of the trigonometry function so that teaching exercises are too typical and slightly old, and sometimes want to Chen made a little renovation, may be due to consider the debt