Trigonométrie Flashcards
1
Q
Cos^2(x)+sin^2(x)=
A
1
2
Q
Cos(2a)=
A
Cos^2(a)-Sin^2(a) = 2cos^2(a)-1 = 1-2sin^2(a)
3
Q
Sin(2a) =
A
2cos(a)sin(a)
4
Q
Cos^2(a) =
A
(1+cos2a)/2
5
Q
Sin^2(a) =
A
(1-cos2a)/2
6
Q
2cos(a)cos(b) =
A
Cos(a+b) + Cos(a-b)
7
Q
Cos(a+b) =
A
Cos(a)Cos(b)-Sin(a)Sin(b)
8
Q
Cos(a-b)
A
Cos(a)Cos(b)+Sin(a)Sin(b)
9
Q
2sin(a)sin(b) =
A
cos(a-b) - cos(a+b)
10
Q
Sin(a+b) =
A
Sin(a)Cos(b) + Sin(b)Cos(a)
11
Q
Sin(a-b) =
A
Sin(a)Cos(b) - Sin(b)Cos(a)
12
Q
2sin(b)cos(a) =
A
sin(a+b) - sin(a-b)
13
Q
2sin(a)cos(b) =
A
Sin(a+b) + Sin(a-b)
14
Q
Sin(a) + Sin(b) =
A
2sin((a+b)/2)cos((a-b)/2)
15
Q
Sin(a) - Sin(b) =
A
2sin((a-b)/2)cos((a+b)/2)
16
Q
Cos(a) + Cos(b) =
A
2cos((a+b)/2)cos((a-b)/2)
17
Q
Cos(a) - Cos(b) =
A
-2sin((a+b)/2)sin((a-b)/2)
18
Q
1/cos^2(a) =
A
1+tan^2(a)
19
Q
Tan(a+b) =
A
(tan a + tan b)/(1-tan(a)tan(b))
20
Q
Tan(a-b) =
A
(tan a - tan b)/(1+tan(a)tan(b))
