cosh() and coshf()

  #include <time.h>
  

  double cosh (double x);

  

  float  coshf(float x);

  

cosh() computes the hyperbolic cosine of x.

The hyperbolic cosine cosh(x). If the computation fails because the value is too large, HUGE_VAL is returned and errno is set to ERANGE.

cos() and cosf(),

sinh() and sinhf(), and

tanh() and tanhf()