take the arccosine of a number in typescript

To take the arccosine of a number in TypeScript, you can use the Math.acos() method. This method returns the arccosine of a number in radians.

Here's an example code snippet:

index.ts
const num: number = 0.5;
const arccos: number = Math.acos(num);
console.log(arccos); // 1.0471975511965979 (in radians)
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In this example, we first declare a variable num and assign it a value of 0.5. We then call the Math.acos() method with num as its argument and assign the result to the variable arccos. Finally, we log the value of arccos to the console, which in this case is 1.0471975511965979 in radians.

Note that the argument passed to Math.acos() should be a number between -1 and 1. If the argument is outside this range, Math.acos() will return NaN.