高中数学公式汇总-天气预报

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高中数学公式汇总

更新时间： 2021-04-03 08:33:27

1、两角和公式

sin(A+B)=sinAcosB+cosAsinB

sin(A-B)=sinAcosB-sinBcosA

cos(A+B)=cosAcosB-sinAsinB

cos(A-B)=cosAcosB+sinAsinB

2、半角公式

sin(A/2)=√((1-cosA)/2)sin(A/2)=-√((1-cosA)/2)

cos(A/2)=√((1+cosA)/2)cos(A/2)=-√((1+cosA)/2)

tan(A/2)=√((1-cosA)/((1+cosA))tan(A/2)=-√((1-cosA)/((1+cosA))

ctg(A/2)=√((1+cosA)/((1-cosA))ctg(A/2)=-√((1+cosA)/((1-cosA))

3、和差化积

2sinAcosB=sin(A+B)+sin(A-B)

2cosAsinB=sin(A+B)-sin(A-B)

2cosAcosB=cos(A+B)-sin(A-B)

关键词：高中数学公式汇总

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