第1739题：有趣的函数图形
能产生以下图形的函数是( )
A. xy=sin(xy)xy=\sin(\dfrac{x}{y})xy=sin(yx)
B. xy=sin(yx)xy=\sin(\dfrac{y}{x})xy=sin(xy)
C. xy=sin(xy)\dfrac{x}{y}=\sin(xy)yx=sin(xy)
D.yx=sin(xy)\dfrac{y}{x}=\sin(xy)xy=sin(xy)
