cosh()

The cosh() function returns the hyperbolic cosine of an argument given in radians.

Syntax

std::cosh(angle)

The angle is measured in radians and the return type is a double, float, or long double.

If the magnitude of the result is too large to express, the function returns HUGE_VAL (positive or negative) and an overflow range error is thrown.

The mathematical formula used in cosh() looks like this:

$cosh(x) = \frac{e^x + e^{-x}}{2}$

Example

This example uses cosh() to return the hyperbolic cosine of 0.0 radians:

#include <iostream>
#include <cmath>

int main() {
  double x = 0.0;
  double result;

  result = std::cosh(x);

  std::cout << "The hyperbolic cosine of " << x << " radians is " << result << "\n";
  // Output: The hyperbolic cosine of 0 radians is 1
}

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Codebyte Example

This example uses cosh() to return the hyperbolic cosine of 1.0 radians:

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