如果sin(x+y)/sin(x-y)=m/n,则tany/tanx的值为?
已知sin(x+y)/cos(x-y)=m/n,则tanx/tany=?
求证tanx+tany/tanx-tany=sin(x+y)/sin(x-y)(详细步骤)
证明 (tanX+tanY)/(tanX-tanY)=(sin(X+Y))/(sin(X-Y))
sin(x+y)=1\2,sin(x—y)=1\3,求[tan(x+y)-tanx-tany]\[tany的平方tan(
若sin(x+y)=1/2,sin(x-y)=1/3,则tanx/tany等于?
若x、y是锐角且tanx=2/3tany=3/4则sin(x+y)等于
已知tanx,tany是方程x平方+Px+Q=0的两个根求sin(x+y)平方+
实数x,y满足tanx=x,tany=y,且|x|≠|y|,则sin(x+y)x+y−sin(x−y)x−y
已知x,y,z都是锐角,sin^2x+sin^2y+sin^2z=1,求tanx*tany*tanz的最值
已知TanX,TanY是方程X^-3X-3=0的俩根,求sin^(x+y)-3sin(x+y)cos(x+y)-3cos
已知tanx+tany=5m,tan(x+y)=6m(m≠0),tan(x-y)=1/7,求m的值及tanx,tany的
已知sin(x+y)=1,求证:tan(2x+3y)=tany