A. 1/2(1+x2)
B. -1/2√1-x2
C. 3/1+x2
D. 1/2√1-x2
If x<1 then (1-2x/1-x+x2)+(2x-4x3/1-x2+x4)+(4x3-8x7/1-x4+x8)+...∞=
If y= ax2+b/x then x2y2=
If x= a cos θ (1+cos θ), y=sin θ(1+cos θ) then (dy/dx)θ=π/2
The derivative of √(Tan-1 x) w.r.to x is
If x2+xy+y2=a2, then y2=
If x= asin 2θ(1+ cos 2θ), y= bcos 2θ(1-cos 2θ), then dy/dx=
If x= 2/t2, y=t3-1, then d2y/dx2=
If y= xsin x+(sin x)x then dy/dx=
If y=Sin-1(x2-1/2) then dy/dx at x=0 is
If x= 2 cos t- cos 2t, y= 2 sin t- sin 2t then dy/dx=