Analog trigonometric circle

Short presentation This is my final and most advanced sinusoidal convertor, it is a truly analogical trigonometric circle, it can be a great tool to explain it to a student struggling with the concept or who needs to touch things to focus. It Is made up of 5 pieces and although a multicolour printer is advised you can do without it. How to use it The bottom piece rotates compared to the top one which has to stay stationary, the feeling is a bit strange at first but you get used to it. You obviously select the angle with the arrow Specs and improvements compared to older versions The angular precision is of half a degree (assuming you use the space in between the graduations as position marker themselves) The precision of the sines and cosines is of 1 hundredth of a unit. (There is just a tiny bit of wiggle that might hinder that but if you try to always remain in the same position, it should be fine). You can use it in reverse knowing the sine or cosine that you have and seeing what an