Different between Big O, Big Omega, and Big Theta Notation

I found a good explanation by Neil And Chase from Khan Academy and want to marks as a note here:

Notation	Name	Represent
Big-O	Big O Notation	the maximum running time
Big-θ	Big Omega Notation	the actual running time
Big-Ω	and Big Theta Notation	the minimum running time,

The example is sine, the trigonometric function of an angle^:

Let uses sin(t) for example:

O(1)	→	the maximum value
Θ(sin(t))	→	the actual value
Ω(-1)	→	the minimum value

 As my understand, they are in this relationship:

 Reference

https://en.wikipedia.org/wiki/Big_Omega_function
https://en.wikipedia.org/wiki/Sine