Truc Flashcards
1
Q
Sh x
A
ex - e-x /2
2
Q
Th x
A
ex - e-x / ex + e-x
3
Q
Ch^2 + sh^2 =
A
1
4
Q
Ch x =
A
1/2 X ex + e-x
5
Q
Solutions complexes de H2, eq caracteristique d’une EDL 2
D = discriminant
A
Si D pas 0 : h(x) = C1er1(x) + C2er2(x)
Si D = 0 : h(x) = (C1 + C2t) eRox
C1 C2 E complexes
6
Q
Solutions réelles de H2, eq caracteristique d’une EDL 2
D = discriminant
A
D > 0 : h(x) = C1er1x + C2 er2x
D=0 : h(x)= (C1+C2t)e Rox
D
7
Q
Lim qd n-> 8 de som1/k^2 =
A
Pi^2/6
8
Q
Chx + sh x =
A
ex
9
Q
Chx - shx =
A
e(-x)
10
Q
(chx)^2 - (shx)^2 =
A
1
