精选优质文档-倾情为你奉上高中三角函数公式大全【来源：全,品中&高*考*网】两角和公式【来源：全,品中&高*考*网】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)3-3cosA【来源：全,品中&高*考*网】tan3a = tanatan(+a)tan(-a)半角公式sin()=cos()=tan()=cot()= tan()=和差化积 sina+sinb=2sincoss
