I’m not sure who initially created the above animation in Desmos, but it’s super helpful for understanding how trig works, and how there’s both a right triangle and a circle involved. Maybe someone working at Desmos created the original? Whoever it was, thank you! And let me know if you know, and I’ll give them credit. I modified the original animation a bit (color coding, adding some points in degrees to translate the radians) so that it’s clearer how the angle is graphed on the x-axis.