What does math.rad mean, and how would I use it? [closed]
What does math.rad mean, and how would I use it?
I have been looking at the ROBLOX Wiki, but I still do not really understand what math.rad does, or how it works.
PLEASE NOTE: I am not requesting any sort of script to be made for me, all I want to know is how it works and what it does.
This is what I want to know:
---What it can do / does
---What it can be used for
---Any other important things
Any help is greatly appreciated!
1 answer
You're probably familiar with the unit of degrees to measure angles. 90 degrees makes a right-angle, 180 degrees is half way around a circle, a full way around a circle is 360 degrees.
While everyday life and engineering typically uses degrees, mathematics and physics typically use a different unit of angle called radians.
There are 360 degrees in a circle.
There are 2*pi radians in a circle. Why? If you have a circle of radius 1 and angle T in radians, the length of the circumference along that angle is T -- which is both convenient, and also beautiful in many identities (e.g., in calculus, d/dx sin(x) = cos(x) if sin and cos take radians)
Because humans typically prefer to use degrees, Lua provides the functions math.rad(deg) which converts deg measured in degrees to radians:
print(math.rad(90)) --> 1.5705 -- (approximately pi/2)
and math.deg(rad) which converts rad measured in radians to degrees:
print(math.deg(math.pi/2)) -- approximately 90
Most functions in Lua use radians rather than degrees. These include
CFrame.Anglesmath.cos/math.sin/math.tanmath.atan2,math.acos,math.atan,math.asin
I personally rarely use math.rad and math.deg, because after using radians for so long I usually think of angles in terms of them. As a result I tend to write things like math.pi/6 rather than math.rad(30) -- but the second is definitely more useful for many cases and many people.
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