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三角恒等变换一直是高考数学的重点和热点,此类试题立足于课本,考查对于三角基本概念的理解、公式的合理变形,以及知识的交汇与链接,全面考查两角和差及倍角公式的综合应用,从各省市的题目来看,此类题型难度一般不大.重点难点本部分内容由两角和差与两倍角公式组成,考查的重点在于三角公式的基本应用,主要是函数名称、角、关系式的变换,很多问题都会与解三角形、向量等概念进行综合考查,
Triangle equal transformation has always been the focus of college entrance examination mathematics and hot topics such as test based on the textbook to examine the understanding of the basic concepts of the triangle, the rational deformation of the formula, as well as the intersection of knowledge and links, a comprehensive examination of the two angles and the difference and the formula Comprehensive application, from the provincial and municipal issues, such questions is generally not difficult.Key points This section consists of two corners and the difference and double angle formula, the focus of the test is the basic application of the triangular formula, the main function name , Angle, relational transformation, many problems will be solved with triangles, vectors and other concepts to conduct a comprehensive examination,