2nd Point of Sector that lies on Circle on a 2D coordinate plane? Hey can anyone help in finding the second coordinate of sector that lies on circle. I have a circle of radius 10 units, centred at (0,0). I am parting a sector of angle theta(sector can be minor or major). I have coordinate of First points of sector that lie on circle wanna find other points. How to achieve that? ![enter image description here](

Let use polar coordinates, then

* $x=R\sin \theta$
* $y=R\cos \theta$



indeed for

* $\theta=0$ we have the point $(0,R)$

* $\theta=\pi/2$ we have the point $(R,0)$




and so on.