which pair of functions is identical?

Here, (a) sin−1⁡(sin⁡x) is defined for x∈−π2,π2, while sin⁡sin−1⁡x is defined only for x∈[−1,1] (b) loge⁡ex, is defined for all x, while eloge⁡x is defined for x>0.  (c) loge⁡x2 is defined for all x∈R−{0}, while 2loge⁡x is definedforx>0. Thus, none is identical.