ran_maths.py

Created by maxime-rigotti

Created on October 29, 2024

842 Bytes


  vecteurs
1 coordonnees prod vectoriel :
comme calcul torseurs

2 prod scalaire :
x*x'+y*y'+z*z'

3 //u// :
sqrt(x2+y2+z2)

4 mesure angle :
u.v=//u//*//v//*cos(uv)
u.v=arcos(u.v///u//*//v//)

  trigo
1 convertir (5pi/8)rad en deg
5x180/8=112.5deg

2 convertir 80deg en rad
80*pi/180=4pi/9

3 equat 2sin(x)-sqrt(2)=0 ds 0;2pi
2sin(x)=sqrt(2)
2sin(x)=sqrt(2)/2
x=pi/4 ou 3pi/4

4 inequat 2cos(x)+1>0 ds 0;2pi
2cos(x)>-1
cos(x)>-1/2
x=2pi/3 ou 4pi/3

  derivation
x=0
x2=2x
x3=3x2
xn=nx**n-1
1/x**n=n/x**n+1
sqrt(x)=1/2sqrt(x)
sinx=cosx
cosx=-sinx
lnx=1/x
e**ax=ae**ax

 integration
k=kx
x=x2/2
x2=x3/3
xn=x**n+1/n+1
1/x2=-1/x
1/x**n=-1/(n-1)x**n-1
1/sqrt(x)=2sqrt(x)
e**ax=e**ax/a
cos(ax+b)=sin(ax+b)/a
sin(ax+b)=-cos(ax+b)/a

integrale 0 10(4e**0.2x+6)=F10-F0
primitiv de (4e**0.2x+6)
calcul avec 10 et 0 en x

  equa diff

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