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三角函数是中学数学的重要内容之一。三角函数的独特性质以及众多的公式,使三角问题的条件较一般代数问题更隐蔽,解答过程考虑不周就容易失误。本文以例揭示三角问题解答时易诱发错误的因素,寻找正确的解法。诱因之一:三角函数化简过程中函数定义域的变化例1、求函数y=tanx1-ta
The trigonometric function is one of the important contents of middle school mathematics. The unique properties of trigonometric functions and numerous formulas make the conditions of the trigonometric problem more subtle than the general algebra problems, and it is easy to make mistakes in the solution process. This article is based on an example to reveal the factors that are likely to induce errors when answering a trigonometric question and find the correct solution. One of the incentives: Change of the function definition domain in the process of trigonometric reduction 1. Find the function y=tanx1-ta