Relationship between a sine-curve and the y-value of the unit circle

Context
This was a project as part of the Talking Maths in Public Animation Collaboration. The prompt for this one was[br][br]"Create an animation that shows the link between a sine curve and a unit circle (i.e. that the y-coordinate of a point on the circle is the sine of the angle to the x-axis at that point)."[br][br]For more information: https://talkingmathsinpublic.uk/animation/

Information: Relationship between a sine-curve and the y-value of the unit circle