NXC  Version 1.2.1 r5
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#define Acos (   _X)    asm { acos __FLTRETVAL__, _X }

Compute arc cosine.

Computes the arc cosine of _X. Only constants or variables allowed (no expressions).

Deprecated:
Use acos() instead.
Parameters
_XFloating point value.
Returns
Arc cosine of _X.