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“1”是一个最基本的数,在数学中若能适时巧妙地用上“1”的一些代换,往往会得到事半功倍的效果,下面举例浅谈“1”的一些妙用.一、“1”在三角函数问题中的妙用
“1 ” is the most basic number. If some substitutions of “1 ” can be used in mathematics in a timely and clever way, the effect of getting twice the result with less effort will be obtained. Some examples of “1 ” are given below Magical. First, “1 ” magical effect in trigonometric functions