The ACOs () method in JavaScript uses a detailed knowledge of the basics

The inverse cosine of the radian returned by this method. The ACOs method returns the numeric value of 0 and pi for radians between x-1 and 1. Returns Nan if the value of the number is outside this range.
Grammar

Math.acos (x);

The following are the details of the parameters:

• X: A number

return value:

• Returns the inverse cosine value of some radians.

Example:

This will produce the following results:

value:3.141592653589793
Second Test value:1.5707963267948965
Third Test Value:nan
fourth T EST Value:nan