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在江苏高考考试说明中,三角函数部分涵盖了八个知识点,其中两角和(差)的正弦、余弦和正切为C级点,函数y=Asin(ωx+φ)的图象和性质及几个三角恒等式为A级点,其余均为B级点,高考中一般以基础题为主,难度基本为容易题或中档题,涉及的问题主要有三个方面——三角函数的图象与性质、三角变换和解三角形.在解题中,常需对角的范围及三角函数值的符号情况进行讨论,对公式进行灵活使用.若审题不严不细,很容易出错,要三思而后行,形成审慎思维的习惯.就学生在解三角函数题型中常见错误的原因进行剖析.
In the Jiangsu college entrance examination examination description, the trigonometric function covers eight knowledge points, where the sine, cosine and tangent of the two corners and (difference) are C-level points. The image and the nature of the function y = Asin (ωx + φ) and Several triangular identities are Grade A points, and the rest are Grade B points. Generally, college entrance exams are mainly based on basic questions. The difficulty level is basically an easy question or a mid-range question. There are mainly three aspects involved in the question: the image and nature of the trigonometric function , Triangular transformation and solution of the triangle.In the problem-solving, often need to diagonal range and trigonometric function symbols to discuss the situation, the formula for flexible use .If the draft is not strict, it is easy to make mistakes, to think twice before forming The habit of cautious thinking analyzes the causes of the common mistakes that students make in solving trigonometrical problems.