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三角函数的求值问题是三角函数中的一个最常见题型.解题过程中,能够多角度思考,多种方法应用,不仅可以起到举一反三的效果,还可以达到事半功倍的功效.
The evaluation of trigonometric functions is one of the most common types of trigonometric functions. In the process of problem solving, multi-angle thinking and application of multiple methods can not only bring about the best results, but also achieve a multiplier effect.