设(X=TCOST,Y=TSINT,求DY/DX
设(X=TCOST,Y=TSINT,求DY/DX
x=a(cost+tsint) y=a(sint—tcost) 求导dy/dx
设x=cost y=sint-tcost 求dy/dx
L为参数方程x=cost+tsint y=sint-tcost 求曲线积分x+e^xdy+(y+ye^x)dx t为0到
设x=1+t^2、y=cost 求 dy/dx 和d^2y/dx^2 sint-tcost/4t^3 和 sint-tc
..参数方程求导.为什么dx/dt=1-sint-tcost?为什么dy/dt=cost-tsint?这个dy/dx=(
设 x/y=ln(y/x) ,求 dy/dx
设y=(x/1-x)^x,求dy/dx
要有具体过程求曲线x=a(cost+tsint),y=a(sint-tcost),(0≤t≤)的长度L 这题我知道是用弧
设y=(x^2),求dy/dx
设y=sin2x/(1+x^2),求dy/dx,
设y=√(x^2-1)求dy/dx