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在解一些代数题时,如果合理运用恒等式m=m(sin2α+cos2α),可以使一些复杂的数学问题简单化.下面结合实例谈谈m=m(sin2α+cos2α)在解题中的妙用.
In solving some algebraic problems, some complicated mathematical problems can be simplified if we use the identity m = m (sin2α + cos2α) rationally. Here we will discuss the magical effect of m = m (sin2α + cos2α) in solving problems with examples.