angle in radians
degrees between 0 and 360 degrees
radiansToDegrees
radiansToDegrees(Math.PI / 2); // => 90
let resultArray = [Math.PI, Math.PI / 2, 0, -Math.PI / 2, -Math.PI];
resultArray.map(radiansToDegrees); // => [180, 90, 0, -90, -180]
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