toRad and toDeg conversion functions

deg2rad.ts

interface Math {
    toRadians(degrees: number): number;
    toDegrees(radians: number): number;
}

// Converts from degrees to radians.
Math.radians = (degrees: number): number => {
    return degrees * Math.PI / 180;
};

// Converts from radians to degrees.
Math.degrees = (radians: number): number => {
return radians * 180 / Math.PI;
};