xy^3-cos(x+y)=1,求dy

xy^3-cos(x+y)=1,求dy xy^3-cos(x+y)=1,求dy x^2+xy+y^3=1,求dy/dx 1,y=e^tanxcos^3x,求dy 2,函数y=y（x）由方程e^(x+y)+arctan(xy)=0确定,求dy/dxy=e^tanx*cos^3x 设e^(x+y)+cos(xy)=0确定y是x的函数求dy y=e^-x cos 3x,求dy. y=(1+x^4)^cos x,求dy急 设y=e^(-x) cos 1/x,求dy. y=e_x cos x 求dy y=(cos^2x) 求dy sin(xy)=x+y,求dy e∧(x+y)+cos(xy)=0,求dy/dx, 求方程所确定的函数的微分dy y=cos(xy)-x Y=Sin5x+cos^3x求dy 设y=cos^2(x+1),求dy 设y=e^cos^2*1/x,求dy y=cos(1-x的平方),求dy dy/dx=1-cos(y-x)