The document describes the profile of the trigonometric function y=sin(x) on a social media site. It provides biographical information about y=sin(x) such as being born in 120 BC in Nicaea, Turkey and having the characteristics of being odd and having a period of 2π. The profile also indicates that y=sin(x) is getting ready to cross the x-axis at intervals of π and includes posts from other trigonometric functions on its wall.