acos Function (ROM Call 0xF5*)

math.h, timath.h

float acos (float x);

Floating point arc cosine.

acos returns the arc cosine of floating point argument x. The result is always in radians.

Note: If the argument is not in range from -1 to 1, acos will return NAN.


Uses: itrig
Used by: cacos, GR3_handleEvent