take the derivative of a function in csharp

main.cs
public static double Derivative(Func<double, double> f, double x, double deltaX = 1e-6)
{
    double xPlusDelta = x + deltaX;
    double xMinusDelta = x - deltaX;

    double yPlusDelta = f(xPlusDelta);
    double yMinusDelta = f(xMinusDelta);

    double derivative = (yPlusDelta - yMinusDelta) / (2 * deltaX);

    return derivative;
}
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main.cs
// Define your function
Func<double, double> f = x => Math.Sin(x);

// Evaluate the derivative of f at x = 0
double derivative = Derivative(f, 0);

Console.WriteLine($"The derivative of sin(x) at x=0 is: {derivative}");
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main.cs
The derivative of sin(x) at x=0 is: 1
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