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在三角函数的解题中,由于概念众多,公式变换灵活多样,因而解题要求较高,学生往往会因解法运用不当,导致出错.如因象限角、区间角、界限角、终边相同的角等定义混淆不清,或因解题中忽视对题设隐含条件的深刻挖掘,不能正确地确定三角函数的符号而产生错解,或因解题中忽视三角函数
In the problem solving of trigonometric functions, there are many concepts and the formulas are flexible and diverse. Therefore, the problems are required to be higher. Students often misuse the solutions and cause errors. For example, the quadrant angle, the interval angle, the boundary angle, and the end edge are the same. The definition of angles is ambiguous, or because of the profound mining of implied conditions for the problem in solving problems, the trigonometric function cannot be correctly determined and misunderstandings are generated, or trigonometric functions are ignored in solving problems.