produitsca.py

Created by elisapuce2005

Created on April 24, 2022

571 Bytes

longueur /u/=racine(x^2u+y^2u)

coordonnée (xB - xa ; yb -ya)

si on a angle : 
  u.v = /AB/*/AC/*cos(AB,AC)
  
projeté orthogonal : 
AB.CD=AB*KH si AB et CD même s
AB.CD=-AB*KH si AB et CD pas ms

méthode analytique avec coordonnées : 
u.v= xx'+ yy' 
xy co Vecteur 1 x'y' co Vecteur2

méthode norme: 
  u.v=1/2(/u/^2+/v/^2-/u-v/^2)
  u.v=1/2(/u+v/^2-/u/^2-/v/^2)

commutatif : u.v=v.u
distributif: u.(v+w)=u.v+u.w

le carré scalaire d'un vecteur 
u, correspond au ps u.u

Le vecteur u est orthogonal à v 
si u.v=0
vecteur normal à la droite

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