Fundamental Identities Flashcards
1
Q
Csc θ
A
1/sin θ
2
Q
Sec θ
A
1/cos θ
3
Q
Cot θ (not sin)
A
1/tan θ
4
Q
Tan θ
A
Sin θ/cos θ
5
Q
Cot θ (not tan)
A
Cos θ/sin θ
6
Q
Sin²θ + ______ = 1
A
Cos²θ
7
Q
____ + cos²θ = 1
A
Sin²θ
8
Q
1 + tan²θ = _____
A
Sec²θ
9
Q
1 + _____ = sec²θ
A
Tan²θ
10
Q
Cot²θ + 1 = ______
A
Csc²θ
11
Q
______ + 1 = csc²θ
A
Cot²θ
12
Q
Cos(2A) =
A
cos²A - sin²A, 1 - 2sin²A, 2cos²A - 1
13
Q
Sin(2A) =
A
2sinAcosA
