Which of the following functions are identical?

(1) For f(x)=log⁡x2, x2>0 or x∈R−{0}      For g(x)=2log⁡x, x>0      Hence, f(x) and g(x) are not identical.(2) f(x)=logx⁡e=1loge⁡x=g(x)      Hence, the functions are identical.(3) f(x)=sin⁡cos−1⁡x=sin⁡π2−sin−1⁡x=cos⁡sin−1⁡x=g(x)     Hence, the functions are identical.