y=e^-x cos 3x,求dy.

y=e^-x cos 3x,求dy. 设y=e^(-x) cos 1/x,求dy. 设y=cos(x^2+e^x)求dy 设y=e^cos^2*1/x,求dy 设y=e^cos^21/x,求dy 设y=e^(-x)cos(3-x),求dy 详细些 y=e_x cos x 求dy y=(cos^2x) 求dy 设函数y=e^2x+cos x求倒数y'与微分dy 设e^(x+y)+cos(xy)=0确定y是x的函数求dy y=cos^2(e^x),求dy.dy=dcos^2(e^x) 1=2cos(e^x)*dcos(e^x) 2=-2cos(e^x)sin(e^x)de^x 3=-(sin2e^x)e^x dx 4第二步为什么会这样变化,怎么多出了个2cos(e^x)? Y=Sin5x+cos^3x求dy xy^3-cos(x+y)=1,求dy xy^3-cos(x+y)=1,求dy y=cos(2x+3)+e^(-5x)求导 答案是否-2sin(2x+3-5e^(-5x)?求y'(X)及dy 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x=e'sin t,y=e'cos t,求dy/dx. 设Y=cos根号X-e负X平方 ,求 DY