JavaScript Math sinh()

// hyperbolic sine of 1
let number = Math.sinh(1);
console.log(number);

// Output: 1.1752011936438014

sinh() Syntax

The syntax of the Math.sinh() method is:

Math.sinh(number)

Here, sinh() is a static method. Hence, we are accessing the method using the class name, Math.

sinh() Parameter

The sinh() method takes a single parameter:

• number - whose hyperbolic sine is to be calculated

sinh() Return Value

The sinh() method returns:

• hyperbolic sine of the given argument number
• NaN (Not a Number) for a non-numeric argument

Example1: JavaScript Math.sinh()

// hyperbolic sine of negative number
let number1 = Math.sinh(-1);
console.log(number1);  

// hyperbolic sine of zero
let number2 = Math.sinh(0);
console.log(number2); 

// hyperbolic sine of positive number
let number3 = Math.sinh(2);
console.log(number3);    

// Output:
// -1.1752011936438014 
// 0
// 3.626860407847019

In the above example, the Math.sinh() method computes the hyperbolic sine of

• -1 (negative number) - results in -1.1752011936438014
• 0 (zero) - results in 0
• 2 (positive number) - results in 3.626860407847019

Note: Mathematically, the hyperbolic sine is equivalent to (e^x - e^-x)/2.

Example 2: Math.sinh() with Infinity Values

// sinh() with positive infinity
let number1 = Math.sinh(Infinity);
console.log(number1); 
// Output: Infinity

// sinh() with negative infinity
let number2 = Math.sinh(-Infinity);
console.log(number2); 
// Output: -Infinity

Example 3: Math.sinh() with Non-Numeric Argument

let string = "Harry";

// sinh() with a string argument
let value = Math.sinh(string);
console.log(value);   

 // Output: NaN

In the above example, we have tried to calculate the hyperbolic sine value of the string "Harry". That's why we get NaN as the output.

Recommended readings:

• JavaScript Math sin()
• JavaScript Math asinh()
• JavaScript Math cosh()