cacos()

Computes the arc value of cosine.

  #include <math.h> 
  double complex cacos(double complex x); 
  float complex cacosf(float complex x); 
  long double complex cacosl(long double complex x);

Parameter

x

A complex value.

Remarks

These functions return the arccosine of the argument x, in radians. If x is out of range then these functions set errno to EDOM and

  fpclassify(cacos(x))

returns FP_NAN.

This facility may not be available on configurations of the EWL that run on platforms that do not have floating-point math capabilities.