Hello, could someone explain to me what it is for math.rad and math.deg I have looked for information and I have learned all the math functions but these two cannot be understood, someone could explain them to me, please 
Code:
print (math.rad()) -- I do not understand what it does or what it is for
print (math.deg()) -- I do not understand what it does or what it is for
math.deg(X) returns X as if it was radians, so returns X in degree conversion
example;
math.deg(math.pi) – pi
math.rad(180) – pi
math.rad() does the same, returns degrees converted in radias
math.deg: turns angle from radians to degrees
math.rad: turns angle from degrees to radians
I think what I can’t understand is what is a radian and what’s a degrees … I’m so confused
Radians: It is the part of a circle where the radius is equal to the arc of the circle.
As if it were a square in a rectangle.
Degrees: They are in the angles, I don’t know how to explain it xd
Formula:
You’re welcome, a pleasure to help you ^ - ^
ahora entiendo esta cosa tan compleja xD gracias