NAME
    IEEESPAcos -- compute the arc cosine of a number

SYNOPSIS
      x   = IEEESPAcos(  y  );
    d0                 d0

    float   x,y;

FUNCTION
    Compute arc cosine of y in IEEE single precision

INPUTS
    y - IEEE single precision floating point value

RESULT
    x - IEEE single precision floating point value

BUGS

SEE ALSO
    IEEESPCos(), IEEESPAtan(), IEEESPAsin()