How to calculate a point with an given center, angle and radius?

Question

In this SO question, someone asked for calculating an angle from three points. I need to do the opposite thing.

I want to draw a clock, and I have tiny tick images.

Answer 1

Your image (center) should be placed at the point (X,Y), where (x,y) are the coordinates of center point, and r is radius

X = x + (r/2)*cos(angle);
Y = y + (r/2)*sin(angle);