求证:tan(3x/2)-tan(x/2)=(2sinx)/(cosx+cos2x)
求证:tan(3x/2)-tan(x/2)=(2sinx)/(cosx+cos2x)
求证:tan(3x/2)-tan(x/2)=2sinx/(cosx+cos2x)
证明:tan[3x/2]-tan[x/2]=2sinx/[cosx+cos2x]
证明:tan[3x/2]-tan[x/2]=2sinx/[cosx+cos2x]
证明tan(3x/2)-tan(x/2)=(2sinx)/(cosx+cos2x)
求证 sin^2x/(sinx-cosx)-(sinx+cosx)/tan^2 x-1=sinx+cosx
cos3x+2cosx=0 .sinx tan x/2 =1 .sinx - cosx = san2x -cos2x
tan(X+45度)=1/3,(sinX-cosX)^2/cos2x?
求证:(sin2x / 1+cos2x) ×(cosx / 1+cosx) =tan(x/2)
求证:tan(x/2)= sinx/(1+cosx)=(1-cosx)/sinx
求证:tan(x/2)=(1-cosx+sinx)/(1+cosx+sinx)
求证:(1+sinx-cosx)/(1+sinx+cosx)=tan(x/2)