精品文档，欢迎下载高中三角函数公式大全三角函数公式两角和公式sin(A+B) = sinAcosB+cosAsinB sin(A-B) = sinAcosB-cosAsinB cos(A+B) = cosAcosB-sinAsinB cos(A-B) = cosAcosB+sinAsinBtan(A+B) =tanA +tanB1-tanAtanBtan(A-B) =tanA -tanB1+tanAtanBcot(A+B) =cotAcotB -1cotB +cotAcot(A-B) =cotAcotB +1cotB -cotA倍角公式tan2A =2tanA1-tan 2ASin2A=2SinA?CosACos2A = Cos2A-Sin 2A=2Cos2A-1=1-2sin2A 三倍角公式sin3A = 3sinA-4(sinA)3 cos3A = 4(cosA)3-3cosAtan3a = tanatan(3+a)tan(3-a)半角公式 sin(A -cos A 2)=2 cos(A 1+cos A 2)=2 tan(A 2)=1-cos A 1+cos A cot
