The acos() method accepts an number and returns its arc-cosine in radians. It returns a numeric value between 0 and pi radians for x between -1 and 1. If the value of number is outside this range, it returns NaN.
The following example demonstrates the usage of the acos() method in CoffeeScript. Save this code in a file with name math_acos.coffee.
Open the command prompt and compile the .coffee file as shown below.
Now, open the command prompt again, and run the CoffeeScript file as shown below.
On executing, the CoffeeScript file produces the following output.
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