Unit Circle Coordinates

Hello, I've just recently learned the unit circle in school and to help myself further understand it, I thought I'd add it to my movement script so that no matter what direction you're moving, you're going the same speed. There are probably other ways to do this but this was just for a learning experience. Here is my code:

     Vector2 desiredInput = Vector2.zero;
     desiredInput.x = Mathf.Cos ( Mathf.Atan2 ( rawInput.y, rawInput.x ) * Mathf.Rad2Deg );
     desiredInput.y = Mathf.Sin ( Mathf.Atan2 ( rawInput.y, rawInput.x ) * Mathf.Rad2Deg );

     float lerpSpeedX = rawInput.x != 0 ? moveSpeedLerpSens : moveSpeedLerpGrav;
     float lerpSpeedY = rawInput.y != 0 ? moveSpeedLerpSens : moveSpeedLerpGrav;

     input.x = Mathf.Lerp ( input.x, desiredInput.x, Time.deltaTime * lerpSpeedX );
     input.y = Mathf.Lerp ( input.y, desiredInput.y, Time.deltaTime * lerpSpeedY );

What about this is wrong? Any help and/or tips would be appreciated!