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2013年高考新课标全国(Ⅰ)卷理科第15题与文科第16题是同一道题:题目设当x=θ时,函数f(x)=sin x-2cos x取得最大值,则cosθ=.本题作为高考中的一道小题,题面简约,背景清晰,但入口较宽,解法灵活,可以多方面、多角度、多层次地检测学生对基础知识、基本技能与基本思想方法的掌握情况,并能有效地考查学生思维的灵活性和敏捷性,是值得深究与欣赏的一道好题.1.万丈高楼平地起,通性通法最本真——三
2013 National Curriculum New Year’s exams (Ⅰ) Volume 15 subjects and liberal arts 16 questions is the same problem: the subject set when x = θ, the function f (x) = sin x-2cos x maximum, then cos θ =. This question as a college entrance examination in a small problem, the problem is simple, the background is clear, but the entrance wide, flexible solution can be multi-faceted, multi-angle, multi-level detection of students’ knowledge of basic knowledge, basic skills and basic ideas and methods Situation, and can effectively examine the students thinking flexibility and agility, it is worth to study and appreciate a good topic .1.