Trigonometric Identities Flashcards
0
Q
Sec(a)
A
1/cos(a)
1
Q
Tan(a)
A
Sin(a)/cos(a)
2
Q
Cot(a)
A
Cos(a)/sin(a)
3
Q
Csc(a)
A
1/sin(a)
4
Q
Sin^2x+cos^2x
A
1
5
Q
1+cot^2x
A
Csc^2x
6
Q
Tan^2x+1
A
Sec^2x
7
Q
Sin(a+b)
A
Sin(a)cos(b)+cos(a)sin(b)
8
Q
Sin(a-b)
A
Sin(a)cos(b)-cos(a)sin(b)
9
Q
Cos(a+b)
A
Cos(a)cos(b)-sin(a)sin(b)
10
Q
Cos(a-b)
A
Cos(a)cos(b)+cos(a)cos(b)
11
Q
Tan(a+b)
A
(Tan(a)+tan(b))/(1-tan(a)tan(b))
12
Q
Tan(a-b)
A
(Tan(a)-tan(b))/(1+tan(a)tan(b))
13
Q
Sin2x
A
2sin(x)cos(x)
14
Q
Cos2(x)
A
Cos^2(x)-sin^2(x)
1-2sin^2x
2cos^2(x)-1
