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三角函数是初等数学中的一个重要知识点,它在几何与代数中有着广泛的应用。本文介绍了三角函数在代数中的应用,应用的关键是将代数量用三角函数表示出来,从而将代数问题转化为三角问题,然后运用三角函数的性质解决问题;重点介绍了三角函数在解方程,求函数的最大值与最小值,证明条件不等式和等式等代数问题中的应用,关键在于三角函数的巧妙引进,将代数问题转化为三角问题。
Trigonometric function is an important knowledge point in elementary mathematics, it has a wide range of applications in geometry and algebra. In this paper, the application of trigonometric functions in algebra is introduced. The key point of the application is that the algebraic quantities are represented by trigonometric functions, so that algebraic problems can be transformed into trigonometric problems, and then trigonometric functions can be used to solve the problems. , Find the maximum and minimum of the function, proving the application of conditional inequalities and equality algebra problems, the key lies in the clever introduction of trigonometric functions, the algebra problem into a triangular problem.