Identités Trigo Flashcards
1
Q
Cos^2(x) + sin^2(x) =
A
1
2
Q
1 + tan^2(x) =
A
Sec^2(x)
3
Q
Cotg^2(x) + 1 =
A
Cosc^2(x)
4
Q
Cos(X + B) =
A
CosXcosB - sinXsinB
5
Q
Sin(X+B) =
A
CosXsinB + CosBsinX
6
Q
Cos2x = (3 égalités)
A
Cos^2(x) - sin^2(x)
1 - 2 sin^2(x)
2 cos^2(x) - 1
7
Q
Sin(2x) =
A
2cosxsinx
8
Q
Sin^2(x) =
A
(1-cos(2x))/2
9
Q
Sin^2(x/2) =
A
(1 - cosx)/2
10
Q
Cos^2(x) =
A
(1 + cos2x)/2
11
Q
Cos^2(x/2) =
A
(1 + cosx)/2
