maths3.py

Created by lucasdiago3

Created on January 05, 2023

1.14 KB


lecon 9 tangante 
y=mx+p --> reponse type
f'(a)(x-a)+f(a)
pour connaitre f'(a) on utilise:
  f(a+h)-f(a)/h
dire que lim h-->0 donc x+h=x

lecon 19 :
   cos2(x) + sin2(x) = 1

  tableau:
degré : 0  30    45    60   90    180   270   360
radian: 0 pi/6  pi/4  pi/3  pi/2  pi    3pi/2 2pi
cos   : 1 3/2  2/2   1/2   0    -1     0     1
sin   : 0  1/2  2/2  3/2   1     0    -1     0

cercle trigo :
  (de droite a gauche)
  0(1;0)2pi            2pi/3(-1/2;3/2)
  pi/6(3/2;1/2)       3pi/4(-2/2;2/2)
  pi/4(2/2;2/2)      5pi/6(-3/2;1/2)
  pi/3(1/2;3/2)        pi (-1;0)
  pi/2(0;1) -->        7pi/6(-3/2;-1/2 )
                       5pi/4(-2/2;-2/2)
                       4pi/3(-1/2;-3/2)
                       -pi/2(0;1)
                       5pi/3(1/2;-3/2)
                       7pi/4(2/2;-2/2)
                       11pi/6(3/2;-1/2)
                       
lecon 20 :
formule 1 avec COSINUS:
u.v=||u||x||v||xcos(u;v)
          OU
 AB.AC=||AB||x||AC||xcos(BAC)
 formule 2 avec projeté hortogonoal
 u.v=OA.OB=OA.OH 
formule 3 avec coorsdonné de vecteur
u.v=xx'+yy'

furmule 4 avec longueur du triangle
AB.AC=1/2(AB**2+AC**2-BC**2)

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