Acos

Parameters
x real
comment

Arctangent, one of inverse trigonometric functions. The result is returned in radians in range [-Pi/2;Pi/2]. Expect values between -1 and 1...returns 0 for invalid input

pure
This function is pure. For the same values passed to it, it will always return the same value.
return type
real
Source code
native Acos takes real x returns real
Source
math.j
wc3modding.com
Acos