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    倍角公式手抄報

    作者:51scb    手抄報來源:我愛手抄報    更新時間:2021/4/7

    一、倍角公式

    1、Sin2A=2SinA*CosA

    2、Cos2A=CosA^2-SinA^2=1-2SinA^2=2CosA^2-1

    3、tan2A=(2tanA)/(1-tanA^2)(注:SinA^2 是sinA的平方 sin2(A) )

    高H猛烈失禁潮喷无码视频

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