精选优质文档-倾情为你奉上三角函数公式积化和差公式汇总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+sinAsinB tan(A+B) =tan(A-B) =cot(A+B) =cot(A-B) =倍角公式tan2A =Sin2A=2SinACosACos2A = Cos2A-Sin2A=2Cos2A-1=1-2sin2A三倍角公式sin3A = 3sinA-4(sinA)3cos3A = 4(cosA)3-3cosAtan3a = tanatan(+a)tan(-a)半角公式sin()=cos()=tan()=cot()= tan()=和差化积 sina+sinb=2sincossina-sinb=2cossincosa+cosb = 2coscoscosa-co
