Fuck I don't remember secondary school math 
How do I calculate ??? if I know X?
@matrix sinus or cosinus or tangent, try each and see if answer makes sense :D
@matrix i think it's tangent or cotangent in this case, or rather arc-tangent/arc-cotangent if you need to find angle
@hj Arctan is better because I need the angle and it's easier to calculate iteratively.
@hj@shigusegubu.club
@matrix math is fun 
