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三角函数作为一种特殊的函数模型,是考生必须重视的一个重要学习环节,在高考中发挥着举足重轻的作用。江苏省2013高考数学考试说明中,三角函数的概念、同角三角函数的基本关系式、正弦函数和余弦函数的诱导公式、正余弦函数以及正切函数的图像与性质、二倍角的正弦余弦正切为B级要求;函数y A sin(wx)图像与性质、积化和差、和差化积及半角公式为A级要求;两角和差的正弦余弦及正切为C级要求。能正确掌握并理解三角函数的概念及性质是解题的基本要求,灵活运用公式提升运算能力是解题的关键。
As a special function model, the trigonometric function is an important learning link that candidates must pay attention to, playing a pivotal role in the college entrance examination. Jiangsu 2013 college entrance examination math test description, the concept of trigonometric functions, the same with the trigonometric function of the basic formula, the sine function and the cosine function of the induction formula, sine and cosine functions and tangent function of the image and nature of the tangent of the cosine of the double angle tangent to Class B requirements; the function y A sin (wx) of the image and its properties, the product and difference, and the product of the difference and the half-angle formula are class A requirements; the cosine and tangent of the two angles and differences are class C requirements. To correctly grasp and understand the concept and nature of the trigonometric function is the basic requirement for solving problems, flexible use of formulas to improve computing power is the key to solving the problem.