Java Mathtanh Examples

Java Math tanh

tanh() accepts a double value as an argument and returns hyperbolic tangent of the argument. The returned value is of type double.

Following is the syntax of tanh() method.

double value = tanh(double x)

Since the definition of tanh() function has double datatype as argument, you can pass int, float or long as arguments; because these datatypes could implicitly promote to double.

We shall learn about some of the special cases for tanh() method with examples.

Example 1 Mathtanhdouble

In the following example, we pass angle in radians as argument to tanh() method and find its value.

Java Program

public class MathExample {
	public static void main(String[] args) {
		double x = 10;
		double result = Math.tanh(x);
		System.out.println(result);
	}
}

Output

0.9999999958776927

Example 2 Mathtanhint

In the following example, we pass an int value for the argument to tanh() method.

Java Program

public class MathExample {
	public static void main(String[] args) {
		int x = 1;
		double result = Math.tanh(x);
		System.out.println(result);
	}
}

Output

0.7615941559557649

Similarly, you can provide a float or long value as argument to tanh() method.

Example 3 MathtanhNaN

In the following example, we pass Double.NaN as argument to tanh() method. As per the definition of the sin() in Math class, the method should return NaN value.

Java Program

public class MathExample {
	public static void main(String[] args) {
		double x = Double.NaN;
		double result = Math.tanh(x);
		System.out.println(result);
	}
}

Output

NaN

Example 4 Mathtanh With Positive Infinity as Argument

In the following example, we pass Double.POSITIVE_INFINITY as argument to tanh() method. As per the definition of the tanh() method in Math class, tanh() should return 1.0, for positive infinity.

Java Program

public class MathExample {
	public static void main(String[] args) {
		double x = Double.POSITIVE_INFINITY;
		double result = Math.tanh(x);
		System.out.println(result);
	}
}

Output

1.0

Example 5 Mathtanh With Negative Infinity as Argument

In the following example, we pass Double.POSITIVE_INFINITY as argument to tanh() method. As per the definition of the tanh() method in Math class, tanh() should return -1.0 for negative infinity value.

Java Program

public class MathExample {
	public static void main(String[] args) {
		double x = Double.NEGATIVE_INFINITY;
		double result = Math.tanh(x);
		System.out.println(result);
	}
}

Output

-1.0

Conclusion

In this Java Tutorial, we learned about Java Math.tanh() function, with example programs.