成考数学公式表(超全含坐标图)word文档

cosαРcos(3π/2+α)=sinαРtan(3π/2+α)=-cotαРcot(3π/2+α)=-tanαРsin(2π-α)=-sinαРcos(2π-α)=cosαРtan(2π-α)=-tanαРcot(2π-α)=-cotαРsin(2kπ+α)=sinαРcos(2kπ+α)=cosαРtan(2kπ+α)=tanαРcot(2kπ+α)=cotαР两角和Р两角差Рsin(α+β)=sinαcosβ+cosαsinβРsin(α-β)=sinαcosβ-cosαsinβРcos(α+β)=cosαcosβ-sinαsinβРcos(α-β)=cosαcosβ+sinαsinβРtan(α+b)=(tan(α)+tan(β)(1-tan(α)tan(β))Рtan(α-b)=(tan(α)-tan(β)(1+tan(α)tan(β)Р倍角Р公式Рsin2α=2sinαcosαРcos2α=cos2α-sin2α=2cos2α-1=1-2sin2αРtan2α=2tanα1-tan2αР半角Р公式Рsin^2(a/2)=(1-cos(a))/2Рcos^2(a/2)=(1+cos(a))/2Рtan(a/2)=(1-cos(a))/sin(a)=sin(a)/(1+cos(a))Р和差Р化积Рsin(a)+sin(b)=2sin((a+b)/2)cos((a-b)/2)Рsin(a)−sin(b)=2cos((a+b)/2)sin((a-b)/2)Рcos(a)+cos(b)=2cos((a+b)/2)cos((a-b)/2)Рcos(a)-cos(b)=-2sin((a+b)/2)sin((a-b)/2)Р三角函数Р图象性质Р余弦Р正弦Р Р三角形Р求面积Рs=12absinCР正弦定理РsinAa=sinBb=Р余弦定理Рa2=b2+c2-2bc cosA