if:`f(x)=(sinx)/(sqrt(1+tan^2x))-(cosx)/(sqrt(1+cot^2x)),` then find the range of `f(x)`

Find the range of f(x)=1/(2cosx-1)

find the range of f(x)=(1)/(1+4cosx)

Find the range of f(x)=sin^2x-sinx+1.

"Let "f(x)=((2^(x)+2^(-x))sin x sqrt(tan^(-1)(x^(2)-x+1)))/((7x^(2)+3x+1)^(3)) . Then find the value of f'(0).

Find the range of f(x)=sin^2x-3sinx+2

Find the range of f(x)=(x^2+1)/(x^2+2)

If f: R->S , defined by f(x)=sinx-sqrt(3)cosx+1, is onto, then find the set Sdot

Find f'(x) if f(x)=sqrt(x^(2)+1)

Find f'(x) if f(x)=sqrt(x^(2)+1)

Find f'(x) if f(x)=sqrt(x^(2)-1)