如果实数x、y满足|tanx|+|tany|>|tanx+tany|,且y∈(π,3π2),则|tanx-tany|等于
已知tanx=2,tany=3,x,y∈(0,π/2),求x+y.
若x、y是锐角且tanx=2/3tany=3/4则sin(x+y)等于
证明 (tanX+tanY)/(tanX-tanY)=(sin(X+Y))/(sin(X-Y))
实数x,y满足tanx=x,tany=y,且|x|≠|y|,则sin(x+y)x+y−sin(x−y)x−y
若sin(x+y)=1/2,sin(x-y)=1/3,则tanx/tany等于?
已知tanx=2,tany=1/3,则tan2(x+y)=
已知tanx=-3/4,且tan(x+y)=1,求tany的值
cos(x+y)=1/5,cos(x-y)=3/5则tanx.tany=?
求证tanx+tany/tanx-tany=sin(x+y)/sin(x-y)(详细步骤)
sin(x+y)=1\2,sin(x—y)=1\3,求[tan(x+y)-tanx-tany]\[tany的平方tan(
已知sin(x+y)/cos(x-y)=m/n,则tanx/tany=?
已知tanx,tany是方程x²+3√3+4=0的两根,且-π/2<x<π/2,-π/2<y<π/2,则x+y