The java.lang.Math.tanh() returns the hyperbolic tangent of a double value passed to it as argument. The hyperbolic tangent of any value a is defined as,
((ea – e-a)/2)/((ea + e-a)/2)
where e is Euler’s number. In other words, we can say that tanh(a) = sinh(a)/cosh(a).
If the argument is NaN, then the result is NaN. If the argument is positive infinity then the result will be +1.0. If the argument is negative infinity then the result will be -1.0. If the argument is zero, then the result is zero with the same sign as that of the argument a.
Syntax :
public static double tanh(double a) Parameter : a : the value whose hyperbolic tangent is to be returned.
Return :
This method returns the hyperbolic tangent value of the argument.
Example 1 : To show working of java.lang.Math.tanh() method.
// Java program to demonstrate working// of java.lang.Math.tanh() methodimport java.lang.Math; class Gfg { // driver code public static void main(String args[]) { double a = 3.5; System.out.println(Math.tanh(a)); a = 90.328; System.out.println(Math.tanh(a)); a = 0; // argument is zero, output will also be 0 System.out.println(Math.tanh(a)); }} |
0.9981778976111987 1.0 0.0
Example 2 : To show working of java.lang.Math.tanh() method when argument is NaN or infinity.
// Java program to demonstrate working// of java.lang.Math.tanh() method infinity caseimport java.lang.Math; // importing java.lang package public class GFG { public static void main(String[] args) { double positiveInfinity = Double.POSITIVE_INFINITY; double negativeInfinity = Double.NEGATIVE_INFINITY; double nan = Double.NaN; double result; // Here argument is negative infinity result = Math.tanh(negativeInfinity); System.out.println(result); // Here argument is positive infinity result = Math.tanh(positiveInfinity); System.out.println(result); // Here argument is NaN, output will be NaN result = Math.tanh(nan); System.out.println(result); }} |
-1.0 1.0 NaN
