Yesterday I was working with `Math.cos`

, `Math.sin`

and `Math.tan`

and was thinking it would be nice to have the equivalent functions which accept the values in degrees instead of radians. For that reason I wrote the following definitions for `Math.cosd`

, `Math.sind`

and `Math.tand`

:

After executing the above 5 lines you will be able to get the cosine at 45° by doing `Math.cosd(45)`

or the sine at 75° by doing `Math.sind(75)`

or the tangent at 135° by doing `Math.tand(135)`

. WARNING: this does extend a built-in object. If you would like these functions in a separate `Degrees`

object so as to avoid mutating a built-in object you could use this:

```
(function (R) {
Degrees = {
cosd: function(d) { return Math.cos(d * R); },
sind: function(d) { return Math.sin(d * R); },
tand: function(d) { return Math.tan(d * R); }
};
})(Math.PI / 180);
```

Have fun! 😎