实数x,y满足tanx=x,tany=y,且|x|≠|y|,则sin(x+y)x+y−sin(x−y)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
证明 (tanX+tanY)/(tanX-tanY)=(sin(X+Y))/(sin(X-Y))
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)
若x、y是锐角且tanx=2/3tany=3/4则sin(x+y)等于
若sin(x+y)=1/2,sin(x-y)=1/3,则tanx/tany等于?
sin(x+y)=1\2,sin(x—y)=1\3,求[tan(x+y)-tanx-tany]\[tany的平方tan(
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
sin(x+y)=1,则tan(2x+y)+tany=
x*y'*sin(y/x)-y*sin(y/x)+x=0 求微分方程的解
求y=|cosx| y=|tanx| y=sin|x| y=cos|x| y=tan|x|周期
已知sin(x+y)=1,求证:tan(2x+y)+tany=0