More Trig Identitys Flashcards
0
Q
Cos(-x)
A
CosX (odd)
1
Q
Sin(-x)
A
-SinX (even)
2
Q
Tan(-x)
A
-TanX (even)
3
Q
Sin (u+v)
A
Sin(u)cos(v)+cos(u)sin(v)
4
Q
Sin (u-v)
A
Sin(u)cos(v)-cos(u)sin(v)
5
Q
Cos(u+v)
A
Cos(u)cos(v)-sin(u)sin(v)
6
Q
Cos(u-v)
A
Cos(u)cos(v)+sin(u)sin(v)
7
Q
Tan(u+v)
A
Tan(u)+tan(v)/(1-tan(u)tan(v))
1-tan(u)tan(v)
8
Q
Tan(u-v)
A
Tan(u)-tan(v)/(1+tan(u)tan(v))
1+tan(u)tan(v)
9
Q
Sin2(u)
A
2sin(u)cos(u)
10
Q
Cos2(u)
A
Cos^2(u)-sin^2(u)
2Cos^2(u)-1
1-2sin^2(u)
11
Q
Tan2(u)
A
2tan(u)/1-tan^2(u)
1-tan^2(u)
12
Q
Sin(u/2)
A
Plus or minus square root of
1-cos(u)/2
13
Q
Cos(u/2)
A
Plus or minus square root of
1+cos(u)
14
Q
Tan(u/2)
A
1-cos(u)/sin(u)
Sin(u)/1+cos(u)
