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在近几年的高考中,三角函数求值问题一直是高考的热点,主要考查三角变换、代数变形的基本运算能力和灵活运用公式、合理选用公式、准确选择解题方向的思维能力。题型主要以填空题和解答题为主,试题一般为容易题和中等题。在2012年的江苏高考试题中的三角填空题出现在了第11题的位置,很多学生在看到这道题目时失去了解题的方向,下面我们就先来看一下这道填空题:
In recent college entrance examination, trigonometric function evaluation has been a hot topic in college entrance examination, the main test triangular transformation, algebraic deformation of the basic computing power and flexible use of formulas, rational use of formulas, accurate choice of the direction of the problem-solving thinking ability. The questions mainly fill in the blank questions and answer questions, the questions are generally easy questions and medium questions. In 2012 Jiangsu Jiangsu college entrance examination questions in the triangle fill in the blank question appeared in the 11th title, many students lost the problem-solving direction in seeing this topic, let’s take a look at this first fill in the blank: