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三角函数是高中数学必修部分的重要内容,也是高考考查的重点之一.该模块知识在生产、生活中有着广泛的应用.同学们在复习时,由于受到知识片面性的制约,加上思考不严谨,概念理解不清,方法选择不当等不利因素的影响,会出现不少的解题误区.本文通过举例,对三角函数中的典型错例进行剖析,供大家学习时参考.例1已知角θ的顶点在原点,始边与x轴的非负半轴重合,终边在直线y=2x上,求
Trigonometric function is an important part of high school mathematics compulsory part and also one of the key points in college entrance examination.The module knowledge has a wide range of applications in the production and living.When the students are reviewing, due to the restriction of knowledge one-sidedness, , The concept of unclear understanding, improper choice of methods and other unfavorable factors, there will be many problem-solving errors.This paper by example, the typical examples of trigonometric functions for analysis, for your reference when learning Example 1 known angle The vertex of θ is at the origin, the beginning coincides with the non-negative semi-axis of the x-axis, and the last is on the line y = 2x