I guess I would first look at it by drawing the four quadrants graph on graph paper. Then look at the angles that your triangle has on the graph to the lower right quadrant. Zero, Zero is at the very center of the graph. This might help you understand how the forces are working.
I do not know if this is the place to post this. I am not a great physicist. Actually, I was an Electronic/Electrical Technician before I retired.
I learned that the vacuum of space is filled with matter/antimatter particles popping out of nothing and destroying themselves almost instantly.
My...