JavaScript Math acosh()

// hyperbolic arc-cosine of 5
let number = Math.acosh(5);
console.log(number); 

// Output: 2.2924316695611777

acosh() syntax

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

Math.acosh(number)

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

acosh() Parameter

The acosh() method takes a single parameter:

• number - a positive value whose hyperbolic arc-cosine is to be calculated

acosh() Return Value

The acosh() method returns:

• hyperbolic arc-cosine of the given positive argument number
• NaN (Not a Number) for zero, negative and non-numeric argument

Example 1: JavaScript Math.acosh() with Positive Numbers

// hyperbolic arc-cosine of an integer
let result1 = Math.acosh(32);
console.log(result1);

// hyperbolic arc-cosine of a floating-point number
let result2 = Math.acosh(4.5);
console.log(result2);

// Output:
// 4.158638853279167
// 2.1846437916051085

In the above example, we have used the Math.acosh() method with

• 32 (integer value) - results in 4.158638853279167
• 4.5 (floating-point value) - result in 2.1846437916051085

Example 2: Math.acosh() with Zero and Negative Numbers

// hyperbolic arc-cosine of a negative number
let result1 = Math.acosh(-12.5);
console.log(result1);
// Output: NaN

// hyperbolic arc-cosine of zero
let result2 = Math.acosh(0)
;
console.log(result2);
// Output: NaN

In the above example, we have used the acosh() method with a negative number and zero. For both values, we get NaN as output.

Note: We can only use the acosh() method with positive numbers.

Example 3: Math.acosh() with Non-Numeric argument

let string ="Harry";

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

 // Output: NaN

In the above example, we have used the acosh() method with the string "Harry". Hence, we get NaN as output.

Recommended readings:

• JavaScript Math cosh()
• JavaScript Math asinh()
• JavaScript Math atanh()