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

let a be the angle, (x,y) the center point and r the radius, then your point will be at

(x + r*cos(a), y + r*sin(a))