三角函数、导数、微分、积分(共4页).doc

精选优质文档-倾情为你奉上三角函数 诱导公式tgA=tanA =sin(-a) = cosasin(+a) = cosasin(-a) = sinasin(+a) = -sinacos(-a) = cosacos(-a) = sinacos(+a) = -sinacos(-a) = -cosacos(+a) = -cosa两角和差公式sin(A+B) = sinAcosB+cosAsinBcos(A+B) = cosAcosB-sinAsinBsin(A-B) = sinAcosB-cosAsinB cos(A-B) = cosAcosB+sinAsinBtan(A+B) =cot(A+B) =tan(A-B) =cot(A-B) =倍角公式三倍角公式半角公式tan2A =sin3A = 3sinA-4(sinA)3sin()=Sin2A=2SinACosAcos3A = 4(cosA)3-3