A. n{xn-1sec2xn+tann-1xsec2x+xn-1/1+x2n}
B. -1
C. 1
D. none
d/dx{xn+1/xn}=
If y=e-x cos x then y4=
If ay4=(x+b)5then 5yy2=1
d/dx{Tan-1(a+bcos x/b+a cos x)}=
d/dx{x√a2+x2+a2Sinh-1(x/a)}=
d/dx{log(x2/ex)}=
If y= a cos x+(b+2x)sinx then y2+y=
d/dx{√(1+sin x/1-sin x)}=
If y2=4ax then 4a(1+y12)3/2+(y2+4a2)3/2y2=
If y=(1+x2)Tan-1x then y2=