Home » JavaScript

Math.acos() Method with Example in JavaScript

JavaScript | Math.acos() Method: Here, we are going to learn about the acos() method of Math class in JavaScript with Examples.
Submitted by Shivang Yadav, on February 03, 2020

JavaScript | Math.acos() Method

Math.acos() is a function in math library of JavaScript that is used to find the value of arccosine of a number and return the value in radians.

Syntax

    Math.acos(x);

Parameters

• x – It represents the value whose arccosine value to be found.

Return Value

The return type of this method is number, it returns the arccosine value of the given x.

Values accepted

Integer, floating-point, numeric string.

Invalid Values

Non-numeric string, empty variable, empty array all will return NaN (Not a Number).

Example 1: Valid values

console.log(Math.acos(-1));
console.log(Math.acos(0.1));
console.log(Math.acos(0));
console.log(Math.acos("0.65"));

Output

3.141592653589793
1.4706289056333368
1.5707963267948966
0.863211890069541

Example 2: Invalid values

console.log(Math.acos("Javascript"));
console.log(Math.acos(2));

Output

NaN
NaN

JavaScript Math Object Methods »

---