结论是:1-cos2x等于2*(sinx)^2,这是通过三角恒等变换得到的。1-cos2x可以写为2sin²x,也可以表示为2cos²x-1,或者1-2(1-cos²x)。这些公式展示了二倍角公式在数学三角函数中的应用,它们通过将一个角的三角函数值转化为其两倍角的表达式,简化了复杂的计算,尤其 ...
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