cacosh()

Computes the inverse hyperbolic cosine.

  #include <math.h> 
  double complex cacosh(double complex x); 
  float complex cacoshf(float complex x); 
  long double complex cacoshl(long double complex x);

Parameter

x

A complex value from which to compute the inverse hyperbolic cosine.

Remarks

These functions return the non-negative inverse hyperbolic cosine of x. If x is out of range then these functions set errno to EDOM and

  fpclassify(cacosh(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.