cosh, coshf : hyperbolic cosine

Synopsis

#include <math.h>
double cosh(double x);
float coshf(float x);
```### Description

cosh computes the hyperbolic cosine of the argument x. cosh(x) is defined as Angles are specified in radians. coshf is identical, save that it takes and returns float.### Returns

The computed value is returned. When the correct value would create an overflow, cosh returns the value HUGE_VAL with the appropriate sign, and the global value errno is set to ERANGE. You can modify error handling for these functions using the function matherr.

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**Authoritative source**: BUSMASTER DITA help source `cosh.dita`, compiled into `BUSMASTER.CHM` with the application.