Which of the following pairs of functions is/are identical ?

Options

A. `f(x)=tan(tan^(-1)x)` and `g(x)=cot(cot^(-1)x)`
B. `f(x)=sin(x)` and `g(x)=sin(sin(x))`
C. `f(x)=cot^(2) x.cos^(2)x` and `g(x)=cot^(2)x - cos^(2)x`
D. `f(x)=e^(ln sec^(-1)x)` and `g(x)=sec^(-1)x`

Answer

A, B, C, D