How to calculate the position of a point on the edge of a circle?

Question

JavaScript

I'm trying to put the center of a circle on the edge of another circle using JS: https://prnt.sc/gv2sbz
Can't use CSS as it's for react-native. But there is I can useposition: absolute

Answer 1

x = X + cos(a) * R, y = Y + sin(a) * R, where
x, y are the coordinates of the center of the small circle;
X, Y - coordinates of the center of the large circle;
a is the angle;
R is the radius of the base circle.