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三角函数是初中数学中的一个极其重要的内容,也是初、高中数学的衔接点之一,而三角函数的求值问题又是三角函数的重点.解决这样的问题的方法很多,这里介绍几种
Trigonometric function is an extremely important part in junior high school mathematics, and it is also one of the connecting points of mathematics in junior and senior high schools. The evaluation of trigonometric functions is also the focus of trigonometric functions. There are many ways to solve such problems.