Trig Identities Flashcards
1
Q
Sin^2 A + Cos^2A =
A
1
2
Q
Sin2A=
A
2sinAcosA
3
Q
Cos2A=
A
Cos^2 A - sin^2 A
2cos^2 A - 1
1 - 2sin^2 A
4
Q
Cos^2A=
A
1/2(1+cos2A)
5
Q
TanA =
A
SinA/cosA
6
Q
SecA=
A
1/cosA
7
Q
CosecA=
A
1/SinA
8
Q
CotA=
A
1/tanA
9
Q
Sec^2A=
A
Tan^2 A + 1
