Donne les coordonnés d’un vecteur passant par 2 points
def xyvec(a,b,c,d): e=c-a f=d-b return(e,f) def equacart(xa,ya,xb,yb): b=xa-xb a=yb-ya c=-a*xa-b*ya return(a,"x+",b,"y+",c,"=0") def equacart2(xa,ya,xu,yu): b=-xu a=yu c=-a*xa-b*ya return(a,"x+",b,"y+",c,"=0")