public class MathL
{
	public static double sqrt(double x)
	{
		return java.lang.Math.sqrt(x);
	}

	public static double power(double x, double y)
	{
		return java.lang.Math.pow(x, y);
	}

	public static double exp(double x)
	{
		return java.lang.Math.exp(x);
	}

	public static double ln(double x)
	{
		return java.lang.Math.log(x);
	}

	public static double log(double x)
	{
		return java.lang.Math.log10(x);
	}

	public static double round(double x)
	{
		return java.lang.Math.round(x);
	}

	public static double sin(double x)
	{
		return java.lang.Math.sin(x);
	}

	public static double cos(double x)
	{
		return java.lang.Math.cos(x);
	}

	public static double tan(double x)
	{
		return java.lang.Math.tan(x);
	}

	public static double arcsin(double x)
	{
		return java.lang.Math.asin(x);
	}

	public static double arccos(double x)
	{
		return java.lang.Math.acos(x);
	}

	public static double arctan(double x)
	{
		return java.lang.Math.atan(x);
	}

	public static double arctan2(double y, double x)
	{
		return java.lang.Math.atan2(y, x);
	}

	public static double sinh(double x)
	{
		return java.lang.Math.sinh(x);
	}

	public static double cosh(double x)
	{
		return java.lang.Math.cosh(x);
	}

	public static double tanh(double x)
	{
		return java.lang.Math.tanh(x);
	}

	public static double arcsinh(double x)
	{
		if(x >= 0.0)
		{
			return ln(x + sqrt(x * x + 1.0));
		}
		else
		{
			return -ln(-x + sqrt(x * x + 1.0));
		}
	}

	public static double arccosh(double x)
	{
		return ln(x + sqrt(x * x - 1.0));
	}

	public static double arctanh(double x)
	{
		return ln((1.0 + x) / (1.0 - x)) / 2.0;
	}




}