证明1+sinx/cosx=tan(π/4+x/2)
证明1+sinx/cosx=tan(π/4+x/2)
1-cosX/sinX=tan(X/2) 请问怎么证明,
帮忙证明tan(x/2)=(1-sinx)/cosx
证明:tan(x/2)=sinx/1+cosx
SinX+1-cosX/sinX-1+cosX=1+tan(X/2)/1-tan(X/2) 请问怎么证明,
求证:tan(x-π/4)=(sinx-cosx)/(sinx+cosx)
如何证明tan x/2 =sin/(1+cosx)=(1-cosx)/sinx
证明tanx+1/cosx=tan(x/2+π/4)
求证 sin^2x/(sinx-cosx)-(sinx+cosx)/tan^2 x-1=sinx+cosx
(sin^x/sinx-cosx)-sinx+cosx/tan^2x-1
证明:tan[3x/2]-tan[x/2]=2sinx/[cosx+cos2x]
证明:tan[3x/2]-tan[x/2]=2sinx/[cosx+cos2x]