Acos

Parameters
xreal

A value between -1 and 1.

comment

Arccos, one of inverse trigonometric functions. The result is returned in radians in range [-Pi/2;Pi/2]. Returns 0 for invalid input.

pure
This function is pure. For the same values passed to it, it will always return the same value.
patch

1.00

Source
common.j (raise an issue to discuss on Github or submit a PR)
return type
real
Source code
native Acos     takes real x returns real