cos()

The cos() returns the cosine of an argument given in radians.

Syntax

std::cos(n)

Example

Use cos() to return the cosine of 3.1416 radians:

#include <iostream>
#include <cmath>

int main() {
  double x = 3.1416;
  double result;

  result = std::cos(x);

  std::cout << "The cosine of " << x << " radians is " << result << "\n";
}

This results in the following output:

The cosine of 3.1416 radians is -1

Codebyte Example

Use cos() to return the cosine of 25 degrees:

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