cos trigonometric function
#include <iostream>
#include <cmath>
int main() {
double angleInDegrees, cosineValue;
// Input angle in degrees
std::cout << "Enter an angle in degrees: ";
std::cin >> angleInDegrees;
// Convert angle to radians
double angleInRadians = angleInDegrees * M_PI / 180.0;
// Calculate cosine of the angle
cosineValue = cos(angleInRadians);
// Display the result
std::cout << "Cosine of " << angleInDegrees << " degrees is: " << cosineValue << std::endl;
return 0;
}